The fischer ventilation duct clamp LGS 1250 for 1250 mm size, two-part design with glued sound insulation insert for fixing spiral pipes or plastic pipes. The large opening angle of the LGS allows for quick and easy installation. The two screws allow for ideal adaptation to suit the outer pipe diameter. Connecting nut with combination thread M 8 / M 10 for holding threaded rods or hanger bolts. Both sides of the clamp are drilled for connection with two screws or threaded rods with nuts. This enables the recommended load to be doubled.