Active Air Stanless Steel Duct Clamps Available In 4", 6", 8", 10", & 12" Stainless Steel & Rust Resistant Worm Drive Adustable w/Screwdriver for a super-secure fit Two Per Pack Product Min Diameter Max Diameter ACC4 4" 3 3/8" 4 5/8" ACC6 6" 5 3/8" 6 5/8"
