Fitment: Fits Flange ID size 4", Clamp size will bigger than 4", make sure the size right Availabel Size:2.5''/3''/3.5''/4'' Features : Flanges ID: 4 inch Clamp:4.25" Made of Zinc Plated iron material Makes it easy to install Maintaining the durability and strength of an exhaust Package Includes: 16 x V band flanges(Male/Female) + Some Hardware (As Picture) 8 x V band Clamp .