White plastic inspection port with a 4" (100mm) opening. These opening ports are useful for sealing off compartments in sailing dinghies and other vessels while still allowing access. This is a...

Black 5'' Opening Inspection Port. Nairn inspection ports are manufactured to high tolerances using premium materials to provide high strength, durability and watertightness even in the most...

5'' Nairn Clear Inspection Port Nairn inspection ports are manufactured to high tolerances using premium materials to provide high strength, durability and watertightness even in the most demanding...

Excellent quality heavy duty "Nairn" brand Australian made nylon inspection ports with rubber "O" ring lid seals. All white, pry-out type.  

4''Nairn Port Black with Clear Lid Nairn inspection ports are manufactured to high tolerances using premium materials to provide high strength, durability and watertightness even in the most...

8'' Opening White Inspection Port Nairn inspection ports are manufactured to high tolerances using premium materials to provide high strength, durability and watertightness even in the most demanding...

6'' Opening White Inspection Port Nairn inspection ports are manufactured to high tolerances using premium materials to provide high strength, durability and watertightness even in the most...

6'' Inspection Port White with Clear Lid Nairn inspection ports are manufactured to high tolerances using premium materials to provide high strength, durability and watertightness even in the most...

4" black screw-on inspection port. Nairn inspection ports are manufactured to high tolerances using premium materials to provide high strength, durability and seal even in the most demanding...