This low profile stainless steel hatch features a mirror-polished lid that is mounted to an aluminum base with beautifully sculpted hinges. A double wide gasket eliminates the potential for leaks. A quick turn collet arm allows the Voyager hatch lid to be held in any position from 0 to 90°. Scratch-resistant tempered glass lens. Locked vent position. Inside/outside opening locking dogs. Hatch Opening: 19-5/16" x 19-5/16". Cutout: 20-3/16" x 20-3/16". O.D. Deck Flange: 21-11/16" x 21-11/16". O.D. Lid: 22-1/16" x 22-1/16".