steel hose clamp 1)Screw: hex-head .Carbon steel or 400/200/300 grade stainless steel . 2)Band: band width :8mm ,12.7mm,14.2mm Stainless steel hose clamp1)Screw: hex-head .Carbon steel or 400/200/300 grade stainless steel .2)Band: band width :8mm ,12.7mm,14.2mm,15.8mm3)Housing: carbon steel or 400/200/300 grade stainless steel