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