Inspection Flap 400 x 400 mm Aluminium Eco Flex with Plasterboard Insert

For wall and ceiling mounting, frame and flap made of aluminium profiles with screwed plasterboard insert H2 according to DIN EN 520, GKBI according to DIN 18180, tested for air sound insulation based on ISO 10140-2. Result rating according to ISO 717-1: Rw (C; Ctr) = 28 dB. 12,5 mm with seal, tested for air permeability in accordance with DIN EN 14351-1, pressure class 4, suction class 44-fold corner connection for high stability. Door leaf can be removed with safety rope without fire protection. Note: When wall mounted, always align the closure upwards. Other sizes available on request.