Molded of high impact UV stable polypropylene. Hatch is low profile for floor mounting. No screws are visible from the exterior. Hatch opens 180 degrees. Has a strong lid with support bars and a double gasket for optimum sealing. New patented easy opening, easy closing slam latch standard. ID 11-1/8 x 7-1/8" OD 14-1/16 x 10-1/4" Cut Out 12-3/16 x 8-3/16" Color Off White