Vetus makes the best Midrange hatch in the business. Made of a sturdy aluminum profile 21 mm with a satin sheen anodized frame. Dark smoke colored acrylic is 10 mm thick. These hatches come with stylish and easy to operate adjusters, allowing the lid to be held open at almost any angle up to 90-degrees. May be fitted on deck and opened from the inside or outside. Has a ventilation position and can be locked completely watertight.