4 Inch Stainless Steel Hose Clamps with Adjustable Worm Gear (4-Pack) Variable fan speed controller 120 volts suitable for duct size of

suitable for duct size of 10" diameter

and perfectly suited for connecting ducting

pipes of 12" (300 mm) diameter

clamps are flexible and ductile

rust resistant

4 Inch Stainless Steel Hose Clamps with Adjustable Worm Gear (4-Pack) Variable fan speed controller 120 volts suitable for duct size ofVabink 4 inch stainless steel clamps are perfectly suited for connecting ducting, hoses, tubes, and pipes of 4" (100 mm) diameter. Tightly secure large duct components such as flexible aluminum foil ducts, hoses, inline booster fans and carbon filters together. Stainless steel clamps are with adjustable worm gear drive, rust resistant, durable and lightweight. Band, housing and screw are all made of stainless steel. Clamps are flexible and ductile.