Best Seller | SPEEDI-BOOT SC-07 Duct Start/Take Off Collar,7" Duct Dia Duct Start/Take Off Collar, Boot Style Speedi-Boot Hanger, Collar Diameter 4 1/8 in, Collar Connection Height 4 1/8 in, Collar Connection Width 8 3/8 in, Material Plastic, Compatible Register Height 8 3/8 in, Compatible Register Width 8 3/8 in, Duct... ... more SPEEDI-BOOT SC-07 Duct Start/Take Off Collar,7" Duct Dia Duct Start/Take Off Collar, Boot Style Speedi-Boot Hanger, Collar Diameter 4 1/8 in, Collar Connection Height 4 1/8 in, Collar Connection Width 8 3/8 in, Material Plastic, Compatible Register Height 8 3/8 in, Compatible Register Width 8 3/8 in, Duct... | | $21.29 go to store |