8' SCREW-OUT DECK PLATEScrew Out; 8 Inch Inner Diameter x 10 Inch Outer Diameter; Polar White; Single; With O-RingFeatures of 8' SCREW-OUT DECK PLATE Easy access to fittings, seacocks, valves, and other systems | Watertight with a positive "O" ring seal | No visible mounting fasteners | Total UV and chemical stability | Requires no tools for openin..