Replace your standard hose clamps with HVAC Quiet Clamps from C.A.P. Made of 2 galvanized steel and lined with thick neoprene, these easy to mount clamps will attach to standard or flexible ducting, inline fans and carbon filters. This versatile synthetic rubber called "neoprene", will reduce noisy vibration and isolate heavy airflow. Quiet Clamps are available in 4", 6", 8", 10" and 12".