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 12" x 9-13/16" OD 14-15/16 x 12-15/16" Cut Out 13-1/16 x 10-7/8" Color Off White