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 5-7/8" OD 8-1/8" Color White Cut Out 6-3/4"