Feature●Bolt these around any duct and attach a piece of metal conduit with flattened and drilled ends (not included) for additional support from a wall or ceilingDescription Material:201 Stainless Steel,Clamp diameter:0.3",Clamp strap width:0.5",length:1.7",quantity:10 Sets,1 Set is 1 Clamp with 2 nails.