Bolt these around any duct and attach a piece of metal conduit with flattened;drilled ends (not included) for additional support from a wall or ceiling

• Amanaote Stainless Steel 2 Inches Diameter Tube Strap Tension Clip Pipe Clamp Pipe Hanger Clamp Hanger (Pack Of 8 Sets)

Amanaote Stainless Steel 2 Inches Diameter Tube Strap Tension Clip Pipe Clamp Pipe Hanger Clamp Hanger (Pack Of 8 Sets)Amanaote