Replace your standard hose clamps with HVAC Quiet Clamps. Made of 2'' galvanized steel and lined with a layer of dense material, these easy-to-mount clamps will attach to standard or flexible ducting, inline fans and carbon filters. The material, a versatile synthetic rubber called Neoprene, will reduce noisy vibration and make the sound of heavy airflow less audible. Quiet Clamps are available in 4'', 8'', 10'', and 12''. Comes in packs of two.