Replace your standard hose clamps with HVAC Quiet Clamps. Made of 2” galvanized steel and lined with a thick layer of the versatile synthetic rubber called neoprene, these easy to mount clamps will attach to standard or flexible ducting, inline fans and carbon filters. Neoprene reduces noisy vibration and isolates heavy airflow. Quiet Clamps are available in 4” & 8”. Sold as a pack of two.