2Pc 3.5" T-Bolt Clamp Silicone Stainless Steel Hose Turbo Intake Intercooler P4 for Buick Regal Made from high quality stainless steel. Clamps are 3"(89mm) inner diameter. T-bolt band is 3/4" (19mm). To ensure a proper fit the thickness of the silicone hose should be 4mm or more. Useful on many different applications like radiator hoses and intake systems.