DescriptionLibero escape and ventilation hatch, sill going strong. This hatch has a hand polished and anodised aluminium frame with a 55 mm corner radius and a 10 mm 'dark smoke' coloured acrylic lid. The escape and deck hatch comes with adjusters allowing the lid to be held open at almost any angle up to 90º. A special friction hinge allows the ventilation hatches to remain open at any angle up to 180º. Type LIBERO is suitable for design category A, Area II.