HPS 100 percent stainless steel embossed hose clamps SAE # 40 6Pcs Pack 2" - 3" (51mm-76mm) are ideal for aircraft, heavy-duty industrial applications as well as outdoor, fresh water and mildly corrosive applications. HPS embossed clamp is design to prevent hose damage during installation and does not corrode like the standard Worm gear clamp. The non-perforated band keeps soft silicone hoses from shearing or extruding during installation. The one piece housing design helps maintaining the integrity of the connection and provides a strong seal. Technical specification: SAE # 40. 100 percent stainless steel. 12mm (1/2") band. 7mm slotted hex head. Heavy duty industrial grade one-piece housing design. Rolled edges prevent hose damage during installation. Effective diameter range: 2" - 3" (51mm-76mm). recommend to use on HPS hoses with inside diameter range from 2" - 2-9/16" (51mm - 65mm). maximum torque Spec: 35 in lbs. Exceeds all SAE requirements. Remark: sold in box of 6.