FA 150 VBF is a sealing flange for dowelling over core drillings and openings up to 150 mm. The advantage is the system connection of FA 150 sealing inserts and system covers for the gas-tight and water pressure-tight building lead-through of Kabuflex R plus conduits, power cables, and electrical conduits from pressure resistance 3.

The front flange can be used in structures made of waterproof concrete, structures with a surface sealing according to DIN 18533 ("black tank"), and for screwing onto housings.