Nairn inspection ports are manufactured to high tolerances using premium materials to provide high strength, curability and water tightness even in the most demanding applications. In short, total product integrity. On this 8" model the lid is a press on type rather than screw in so requires a lever or screwdriver to remove. A good option for compartments that need to be accessed infrequently.
All models incorporate "O" ring seals.
In the 8"model, the seal is from nitrile rubber and is in the lid.
Rims and lids are made from ABS plastic
All rims have wide caulking flanges
Cut out: 207mm