Fitment: For 1-1/4" Outer Diameter (OD) Pipe. Includes Saddle with M8 Studs and 1/2 inch nuts (2-Pack) Numerous applications from flex pipe install, exhaust systems for gas/diesel vehicles, tractors, or other heavy machinery Heavy-duty steel design with Saddle Style U-Bolt Clamp will not break. Zinc finish for rust and corrosion resistance. USA-Based Ohio Diesel Parts Brand Universal exhaust clamp has numberous applications for systems on gas/diesel vehicles, tractors and farm equipment, or heavy machinery. Steel and zinc construction for long-lasting use. Sizing is the (OD) Outer Diameter of the pipe. Actual size of clamp may be slightly larger.