Flexible duct hanging strap which attaches to buildings, it should be used in conjunction with a hanging saddle
Master Flow 1.75 in. W x 100 yd. Woven Vinyl Hanger Strap HS1.75WV - The Home Depot
50 in Duct, Duct Hangers
50 in Duct, 660 lb Capacity, Duct Hangers - 6PFZ3
Hanger Straps for ductwork - Vents & Ducts
Duct Fittings
Refrigeration
Hardware & Building Construction
Galvanized duct strap, Solid strapping, easy to drill or nail, Convenient cardboard dispenser
Diversitech Corporation, 606, Hanger Straps, 710-005
Duct Straps and Hangers
Hanger Strap—10-ft Strips - Conklin Metal Industries
Piping Accessories
Duct Reece
Duct Hangers, For Nominal Duct Diameter 50 in, Gas Appliance Category Not Applicable, Material Steel, Inside Diameter 1/2 in, Load Capacity 660 lb,
Steel Round Duct Strap Hanger, Up to 50, PK5