KRAL series aluminum dampers are made of aluminum profiles filled with water-resistant gypsum cardboard plate with a thickness of 12, 5 mm.
The flaps used locks spring, so we obtain a surface devoid of handles and grips.
Opening the flap occurs when pressed surrounding the long edge of the opening.
KRAL flaps allow easy access to wall and ceiling inspection holes and cavities, which are gas meters, water meters, electricity meters, hydrants, domestic, etc.
Produced in large sizes also allow development of space, in which there are significant overall dimensions separately, eg CO splitters.