Lewmar 399440303. Low profile hatch with stay arm. This sleekly designed Low Profile Hatch is ideal for use on a powerboat. Features Lewmar's unique sealing system allowing easy acrylic replacement. Anodized aluminum frame resists corrosion and curved upper frame profile provides strength and modern styling. Outside handles allow opening from on deck, if hatch is unlocked. Suitable for CE Area 2 (Deck, Coachroof, Cockpit and Transom). Overall dimensions: 20-3/16" x 20-3/16" x 1" Cutout: 17-3/8" x 17-3/8".