2 set conversion : 1 set Front 180Mm Rear 160Mm & 1 set Front 160Mm Rear 140MmFits post mount brake to IS/PM mount fork/ frameDesigned for Avid, for , for , etc, Disc Break system.Bolts are included with adapter.Excellent Adapter made by Super Strength and Light Alloy.Colour:blackMaterial:Aluminum alloyFront 180Mm Rear 160Mm:Adapting IS-interface(51mm) fork or frame to PM-interface(74mm) caliper.Mounted at front (Fork) for 180mm Rotor / Or mounted at rear (frame) for 160mm Rotor.screw Material:steelSize: 84.4*10mmFront 160Mm Rear 140Mm:Size:84.2*10mmPackage Contents:2 * conversion 4 * screwOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.