Bomar 900 Series Molded Hatch 8-7/8 Square 2-Dog White. Hatch has quick action dogs, collect arm and vent position. Smoke color acrylic lens. Options Sold Separately: Trim ring (GT 910-1 black, GT 910-2 white) and screen (GS 910-18 black, GS 910-28 white). Hatch Opening: 8-7/8 inches x 8-7/8 inches (225 millimeters), Outside Deck Flange: 11-1/2 inches x 11-1/2 inches (292 millimeters), Outside Lid: 11-3/16 inches x 13-1/16 inches (300 millimeters x 306 millimeters), Cutout: 9-1/2 inches x 9-1/2 inches (241 millimeters), Cutout Radius: 1-1/4 inches (32 millimeters), Weight: 3-1/2 pounds.