Use these 4” all steel, spring tension clamps to securely attach and seal duct, pipe or hose. Clamps spring adjust to fit 4 in. diametr duct, and can be installed and removed with a pair of pliers.
All steel clamps "spring" adjust to fit 4 in. diameter duct
Spring style clamps can be installed and removed with a pair of pliers
Spring tension metal clamps are popular for ease of use and strength of fit