Watertight deck plates with secure snap-fit closure and o-ring seal. Flange has beveled edge, pry out notch and six countersunk fastener holes. Structural material stands up to tough service, extreme weather and solvents. Requires 6 - #8 pan-head screws (not provided). ID 7-7/8" OD 10-1/8" Color White Cut Out 8-3/4"