The sleekly designed Low Profile Hatch is ideal for use on a powerboat. Smaller ventilation hatches are a better fit for sailboats, while the larger sizes can be used as foredeck hatches on smaller to mid-size yachts. Our hatches feature Lewmar's unique sealing system allowing easy acrylic replacement. All sizes are suitable for CE Area 2 (Deck, Coachroof, Cockpit and Transom). Specification: External Length - 560 mm, External Width - 560/675 mm, Height - 25 mm, Radius - 72,5 mm, Internal Length - 405 mm, Internal Width - 403/524 mm, Internal Radius - 42,5 mm, Acrylic Window Thickness - 10 mm, Acrylic Colour - smoke grey, Weight - 6,7 kg.