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."S" series clamps are designed to fit Series 202 silicone exhaust hose which has a little smaller wall thickness and requires a slightly smaller clamp.