1000 P Series Anodized heavy-duty aluminum frames No sharp corners to snag lines or sails Spare parts available Heavy-duty acrylic lens Quick acting, adjustable tie down dogs CE approval available Heavy-duty hinges Molded trim ring, sewn screen available on select sizes Locked vent position SS riser arm rod Outer Diameter radius is 2 7/8" (73mm) on all square & rectangular hatches Cut out radius is 1-11/16" (43mm) on all square & rectangular hatches Hatch Opening: 19-1/16" x 19-1/16" Cut Out: 20 3/16" x 20 3/16" Outer Diameter of Deck Flange: 21-13/16" x 21-13/16" Outer Diameter of Lid: 22 7/8" x 22 7/8" Height of Deck To Lid: 15/16"