Clevis Hanger, Size 4, w/Insulation Saddle System, Material of Construction Malleable Iron, Pipe Size 1 1/2 To 3 In, Max. Load 550 Lb., Insulation Thickness 1/2 To 1 In, Insulation OD 1 To 2 In, Length 7 13/16 In, Standards and Approvals ASTM E84 Class 1 25-60 rating, UL E94 VO