Description ITEM DESCRIPTION: 1. T-Bolt clamps provide uniform sealing pressure for a positive, reliable seal which are frequently installed on coolant and air-intake systems for construction, truck, and bus engines. Through the use of bolts and studs design, T-Clamps can be implemented a much more tighter and durable hold for silicon couplers, rather than the normal screw design clamps. 2. 100% Brand New 3. Clamp Range: 35 mm-40 mm or 1.38"-1.57" 4. Material: 301ss Stainless Steel 5. Band Width: 19 mm or 0.75" 6. Band Thickness: 0.6 mm 7. This T-Bolt Clamp fits for 1 1/8" or 28 mm inner diameter silicone hose .