Size Range: 1.1875"-1.750" OR 30mm-45mm; Constructed of stainless steel continuous band with extruded, asymmetrical threads; Asymmetrical (offset) gear box minimizes clamp twist when tightening; Combination of asymmetrical gear box and extruded threads even clamping force over hose surface; Withstand up to 3.7 ft./lbs. (5mm)