Corrosion resistant 316 stainless steel for exhaust or intake - Any below water line application. Works with corrugated hose. Full 360 clamping surface. 3/4" band, extra long 1/4" bolt & nylon insert locknut. Torque to 75 in. lbs. maximum.. For Silicone exhaust hose, use "S" series T-Bolt Clamps to accomodate the thinner wall on those hoses.