Flange diameter: 3.75 "95mm. Flange and clamp made of 304 stainless steel. For turbo and exhaust applications. Dimensions: Inner diameter: 95mm Outer diameter (welding side): 103mm Outer diameter (band side): 113mm Flange diameter: 3.75 "95mm. Plate and clamp made of 304 stainless steel. For turbo and exhaust system applications.