Double glazed - high insulation level Sturdy spring-assisted opening arms Can be opened out to all four sides up to 6.5 cm Forced air ventilation Mosquito net and blackout blind can be folded away
Technical data: Cutout size: 400 x 400 mm External dimensions: 470 x 470 mm Roof thickness: 24-56 mm Height above roof: 100 mm Hatch cover colour: white
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