316 SS T-Bolt Clamp - 3/4" Band - 4.28"-4.59" Range Very strong and secure clamp for critical installations. Trident Marine T-Bolt Clamps are built with safety in mind. With a 3/4" (19 mm) wide band, this clamp ensures a greater area of coverage for a positive and strong union. It is recommended that two clamps be used on each end of a wet exhaust installation. Specifications: Band & Housing: 316 stainless steel 3/4 in. wide band T-Bolt and Nut: 18-8 stainless steel with nylon insert Hose Outer Diameter (inch): 4.28" to 4.59" T-bolt clamps are designed to assure proper coupling retention for any marine hose. They offer a full 360deg; clamping surface, ideal for any below water line connection. Series 720 clamps have a 3/4 in. wide 301 stainless steel band with a 1/4 in. 18-8 stainless steel bolt and nylon insert lock nut. Torque to 75 inch-pounds maximum. The 720 Series clamps come in two size ranges: our L (Long) range is sized for black rubber water/exhaust hoses, while out HT (Hi-Temp) range is sized for the thinner walled blue silicone exhaust hoses.- L Series clamps are sized for thicker walled, black rubber water/exhaust hose- HT Series clamps are sized for thinner walled, blue silicone exhaust hose