Heavy duty extruded aluminium frames, available in a choice of clear or black anodised finish with a tough smoke acrylic lens. Portlights are available in opening or fixed configuration in selected sizes. Supplied complete with internal anodised aluminium trim ring and insect screen. Suitable for hull thicknesses 6 to 36mm, with no fixing screws visible from the exterior. Multiple quick action clamps secure the lens against the rubber seal in the frame to ensure watertight closure.