Bomar Extruded NIBO Hatch N1080-10A Low Profile Square Hatch. This hatch is constructed of anodized aluminum for rugged durability and has a high-impact acrylic lens. Design features include quick-acting tie-down dogs and lockable vent position. Spare parts available on request.

Height Deck to Lid: 15/16" (24mm)
Hatch Opening: 17 3/8" x 17 3/8" (441mm)
Cut Out Size: 18 1/2" x 18 1/2" (470mm)
Outside Dimensions Deck Flange: 20 1/8" x 20 1/8" (511mm)
Outside Lid Dimensions: 20 15/16" x 19 15/16" (532mm x 506mm)
OD Radius: 2 7/8 inches (73mm)
Cutout Radius: 1 11/16" (43mm)
For the A-series hatch allow at least 1/2" (13mm) clearance for the external hinge. Weight 14 pounds.