Cast Almag-35 aluminum alloy for long life in the marine environment, this commercial-grade hatch features a low profile with a non skid surface. Locking T-handles ensure a secure close. Lid can be removed for enhanced access. Powder coating available by Special Order.Type: Inspection hatchOpening: 19 1/4" x 10 1/16" (489mm x 256mm)Cutout: 21" x 12" (533mm x 304mm)OD of Deck Flange: 24 7/16" x 14 7/16"(621mm x 367mm)Depth Below Flush: 1/2" (13mm)Weight: 12 lb. Material: Almag-35 aluminum alloyLatches: Locking T-handle