Outside Dimensions 12-7/8" (327mm) x 36" (915mm) Inside Dimensions 9-3/8" (239mm) x 32-1/2" (826mm) Cut-out Dimensions 11-3/16" (285mm) x 34-3/16" (869mm) Feature: Part Weight : 8.2 lbs Made in USA Low Profile (3/8" above mounting surface), perfect for floor mounted applications! Mounting Hardware Not Included* (#8 Stainless Steel Panhead Screw) The "Flush Series" hatch is highly durable. The reinforced ribs make it capable of being stood or walked on for long periods of time. This is our lowest profile hatch that minimizes the chance of it being a tripping hazard as well if mounted in a high traffic area. The improved gasketing system provides a watertight seal that will keep everything underneath it dry. This product holds up to the harshest of weather conditions and is impervious to harsh chemicals. All of our products are UV stabilized minimizing degradation from prolonged sunlight exposure. Our superior 316 stainless steel piano hinge system prevents any premature rusting due to saltwater. Superior materials for a superior product.