![ark-1500x1500](https://www.rhsboating.com.au/images/com_hikashop/upload/ark-1500x1500.jpg)  Description:
Prepare your boat trailer for the next trip with ARK trailer parts and accessories from RHS Boating & Marine. Explore jockey wheels, trailer plug adaptors, lighting and selected axle repair accessories to help with maintenance, replacement and practical upgrades.

Whether you are replacing a worn jockey wheel or matching your trailer connection to your tow vehicle, choosing the correct component makes the job easier. Compare wheel size, mounting arrangement, rated capacity and plug configuration against your existing equipment. For lighting, check voltage, dimensions and connection requirements before ordering. Browse ARK products by application and use the individual specifications to find the right fit for your trailer.

           [ ![RWB4132](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4132.jpg "Nairn Inspection Port Replacement Lid - Clear - 100mm (4 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-100mm-4-inches.html)

   $12.30  each    [ Nairn Inspection Port Replacement Lid - Clear - 100mm (4 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-100mm-4-inches.html)      [ RWB4132 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-100mm-4-inches.html)

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   [ ![RWB4135](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4135.jpg "Nairn Inspection Port Replacement Lid - Clear - 125mm (5 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-125mm-5-inches.html)

   $14.76  each    [ Nairn Inspection Port Replacement Lid - Clear - 125mm (5 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-125mm-5-inches.html)      [ RWB4135 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-125mm-5-inches.html)

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   [ ![RWB4138](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4138.jpg "Nairn Inspection Port Replacement Lid - Clear - 150mm (6 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-150mm-6-inches.html)

   $17.44  each    [ Nairn Inspection Port Replacement Lid - Clear - 150mm (6 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-150mm-6-inches.html)      [ RWB4138 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-clear-150mm-6-inches.html)

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   [ ![RWB4131](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - White - 100mm (4 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-100mm-4-inches.html)

   $10.86  each    [ Nairn Inspection Port Replacement Lid - White - 100mm (4 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-100mm-4-inches.html)      [ RWB4131 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-100mm-4-inches.html)

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   [ ![RWB4134](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - White - 125mm (5 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-125mm-5-inches.html)

   $12.65  each    [ Nairn Inspection Port Replacement Lid - White - 125mm (5 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-125mm-5-inches.html)      [ RWB4134 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-125mm-5-inches.html)

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   [ ![RWB4137](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - White - 150mm (6 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-150mm-6-inches.html)

   $15.04  each    [ Nairn Inspection Port Replacement Lid - White - 150mm (6 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-150mm-6-inches.html)      [ RWB4137 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-white-150mm-6-inches.html)

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   [ ![RWB4108](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4108.jpg "Nairn Inspection Port with Kit Bag - All black - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-125mm-5-inches-opening.html)

   $56.82  each    [ Nairn Inspection Port with Kit Bag - All black - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-125mm-5-inches-opening.html)      [ RWB4108 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-125mm-5-inches-opening.html)

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   [ ![RWB4116](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4116.jpg "Nairn Inspection Port with Kit Bag - All black - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-150mm-6-inches-opening.html)

   $62.55  each    [ Nairn Inspection Port with Kit Bag - All black - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-150mm-6-inches-opening.html)      [ RWB4116 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-black-150mm-6-inches-opening.html)

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   [ ![RWB4109](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - All white - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-125mm-5-inches-opening.html)

   $56.82  each    [ Nairn Inspection Port with Kit Bag - All white - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-125mm-5-inches-opening.html)      [ RWB4109 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-125mm-5-inches-opening.html)

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   [ ![RWB4117](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - All white - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-150mm-6-inches-opening.html)

   $62.55  each    [ Nairn Inspection Port with Kit Bag - All white - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-150mm-6-inches-opening.html)      [ RWB4117 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-all-white-150mm-6-inches-opening.html)

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   [ ![RWB4110](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - Black with clear lid - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-black-with-clear-lid-125mm-5-inches-opening.html)

   $60.24  each    [ Nairn Inspection Port with Kit Bag - Black with clear lid - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-black-with-clear-lid-125mm-5-inches-opening.html)      [ RWB4110 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-black-with-clear-lid-125mm-5-inches-opening.html)

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   [ ![RWB4111](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - White with clear lid - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-125mm-5-inches-opening.html)

   $60.15  each    [ Nairn Inspection Port with Kit Bag - White with clear lid - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-125mm-5-inches-opening.html)      [ RWB4111 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-125mm-5-inches-opening.html)

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   [ ![RWB4119](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port with Kit Bag - White with clear lid - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-150mm-6-inches-opening.html)

   $67.10  each    [ Nairn Inspection Port with Kit Bag - White with clear lid - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-150mm-6-inches-opening.html)      [ RWB4119 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-with-kit-bag-white-with-clear-lid-150mm-6-inches-opening.html)

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   [ ![400355](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/400355.jpg "Nairn Marine Drain Plug and Housing – Boat Plumbing Fittings") ](https://www.rhsboating.com.au/categories/nairn-marine-drain-plug-and-housing-boat-plumbing-fittings.html)

   $9.14  each    [ Nairn Marine Drain Plug and Housing – Boat Plumbing Fittings ](https://www.rhsboating.com.au/categories/nairn-marine-drain-plug-and-housing-boat-plumbing-fittings.html)      [ 400355 ](https://www.rhsboating.com.au/categories/nairn-marine-drain-plug-and-housing-boat-plumbing-fittings.html)

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   [ ![RWB4100](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All black - 100mm (4 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-100mm-4-inches-opening.html)

   $17.83  each    [ Nairn Nylon Inspection Port - All black - 100mm (4 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-100mm-4-inches-opening.html)      [ RWB4100 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-100mm-4-inches-opening.html)

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   [ ![RWB4104](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All black - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-125mm-5-inches-opening.html)

   $21.37  each    [ Nairn Nylon Inspection Port - All black - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-125mm-5-inches-opening.html)      [ RWB4104 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-125mm-5-inches-opening.html)

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   [ ![RWB4112](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All black - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-150mm-6-inches-opening.html)

   $25.06  each    [ Nairn Nylon Inspection Port - All black - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-150mm-6-inches-opening.html)      [ RWB4112 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-black-150mm-6-inches-opening.html)

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   [ ![RWB4101](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All white - 100mm (4 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-100mm-4-inches-opening.html)

   $17.83  each    [ Nairn Nylon Inspection Port - All white - 100mm (4 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-100mm-4-inches-opening.html)      [ RWB4101 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-100mm-4-inches-opening.html)

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   [ ![RWB4105](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All white - 125mm (5 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-125mm-5-inches-opening.html)

   $21.37  each    [ Nairn Nylon Inspection Port - All white - 125mm (5 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-125mm-5-inches-opening.html)      [ RWB4105 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-125mm-5-inches-opening.html)

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   [ ![RWB4113](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Nylon Inspection Port - All white - 150mm (6 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-150mm-6-inches-opening.html)

   $25.06  each    [ Nairn Nylon Inspection Port - All white - 150mm (6 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-150mm-6-inches-opening.html)      [ RWB4113 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-all-white-150mm-6-inches-opening.html)

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   [ ![RWB4102](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/RWB4102.jpg "Nairn Nylon Inspection Port - Black with clear lid - 100mm (4 inches) Opening") ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-black-with-clear-lid-100mm-4-inches-opening.html)

   $20.11  each    [ Nairn Nylon Inspection Port - Black with clear lid - 100mm (4 inches) Opening ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-black-with-clear-lid-100mm-4-inches-opening.html)      [ RWB4102 ](https://www.rhsboating.com.au/categories/nairn-nylon-inspection-port-black-with-clear-lid-100mm-4-inches-opening.html)

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