Fiamma Rooflight Vent 40 CrystalA 40 x 40cm Fiamma roof vent designed to provide permanent ventilation for constant exchange of air. Suitable for motorhomes, caravans and van conversions, this model is fitted with an aluminium mosquito net and has a transparent 'crystal' cover letting in as much light as possible. The aerodynamic design means this vent does not need to be fitted with a spoiler and noise and vibrations are greatly reduced. A patented rubber seal and high quality UV