Breeze CT-300L Heavy Duty Constant Torque Liner Clamp with Stainless Screw Effective Diameter Range: 2-1/4" - 3-1/8" (57mm - 79mm) Torque Rated 50-125 in/lbs Stainless Steel Hex Screw, Spring and 5/8" (16mm) Stainless Steel Band Patented, pressure compensating clamping system Designed to self adjust to thermal expansion and contraction Custom designed Stainless steel Belleville springs. Heavy duty construction stops fluid leaks