Noise Reduction Clamp, Duct Coupler with Stainless Steel Clamps, 4-Inch

Rubber pipe coupling designed to securely pair ducted components together while preventing air leaks.
Matte black rubber construction is flexible, heavy-duty, and can easily fit over duct ports and piping.
Minimizes noise by absorbing sound waves from fan vibrations and airflow traveling through ductwork.
Creates an airtight seal and hold using adjustable stainless steel hose clamps with worm drive locks.
4 inch coupler fits inline fans and carbon filters with solid duct ports in growing and HVAC settings.