DescriptionMedium duty porthole. This porthole is suitable for use in the coachroof side. Porthole comes with a 10 mm 'smoke' coloured, unframed opening panel. The clamp type installation ensures that no fasteners are visible from either inside or outside. The porthole can be held open in any position due to the friction type hinges. In the closed position, 2 knobs ensure complete water tightness. As standard a mosquito screen is supplied. The porthole can be fitted in a surface with a minimum thickness of 2 mm and a maximum thickness of 18 mm.