2.5" Zinc Coated Stainless Steel T-Bolt Clamp Made of High Quality Stainless Steel For Strength & Durability. Universal Application For Use With Turbo, Intake, Intercooler Piping & Silicone Hoses Zinc Coated Stud That Reflects Quality And Style 10 MM Lock Nut Bolt That Secures A Tight Hold Designed To Avoid Cutting Into Couplers And Hoses Clamp Diameter: 2.5 Inch