4.5" T Bolt Hose Clamp Spring Loaded Stainless Steel - Working Range 121-129mm for 4.5" I.D. Hose with 3mm - 6mm Wall Thickness, Auto-adjusting maintain Constant Clamping Force (121-129mm, 2 Pack)

4.5"" T Bolt hose clamps: Stainless Steel Band, Stainless Steel Bolt, Zinc Plated Carbon Spring, Floating Bridge, and Nylon Insert Locknut. 4.5 inch T-bolt Hose Clamp Working Range Diameter: 4.76"" - 5.08"" same as 121mm - 129mm for 4.5 inch Nominal Hose with 3mm - 6mm Wall Thickness, Suggest to check your Hose OD size to fit the working range before purchasing. Roadformer Spring Loaded T-Bolt Clamps offer a high performing sealing solution in demanding applications with highly fluctuating temperatures and pressure, The constant tension design helps prevent loose connections and leaks due to temperature fluctuations in critical applications. This Tbolt Hose Clamps automatically compensate for thermal expansion and contraction of hose or fitting connections to maintain constant tension and uniform sealing pressure for a positive reliable seal throughout extremely low or very high temperatures and thermal cycling. Roadformer Clamps is Durable, long-lasting design that withstands thermal stress and provides a high level of vibration, shock, temperature, and corrosion resistance. Roadformer Quality set the industry standard. Wide applications and installations include silicone hoses on turbo charge air cooling/air to air, after cooling systems, and primary engine coolant systems in Automotive, Truck, Off-Highway, Racing Car, Marine, and Agriculture Equipment