Pipe Repair Clamps Bolt Material Steel Clamp Material Stainless Steel Clamp Material Grade 304 For Maximum Copper Tube Size 1 1/2 in For Maximum Outside Diameter 1 7/8 in For Minimum Copper Tube Size Not Applicable For Minimum Outside Diameter 1 7/8 in For Pipe Size 1 1/2 in Gasket Coverage Full Coverage Gasket Material Nitrile Rubber Maximum Operating Pressure 150 psi Maximum Vacuum Pressure 10 psi Number of Bolts 4 Outlet Connection Type Not Applicable Overall Length 12 in