Reduce noise and vibration in your grow room by using our Neoprene-lined Whisper Clamps. Made of 2″ wide galvanized steel with a thick neoprene liner, these clamps will attach to any type of ducting (standard or flexible), inline high-velocity fans, carbon filters, and reflector ventilation ports. The 2″ width of the Whisper Clamps makes for a large area of coverage while the easy to use dual mounting screw bracket ensures a super tight connection. The synthetic Neoprene rubber provides an airtight seal that also dampens the noise and vibration commonly associated with ventilation systems. This is a top of the line product made for discerning gardeners who wish to replace standard hose/worm clamps. Available in 4″, 6″ and 8″ sizes.