Made From ABS High Impact Plastic. 12v Inbuilt LED Indicators - Connect Positive & Negative Wires To Your Bikes' Existing Turn Signal / Indicator Wiring. All Fitting Hardware Included. Mounts To 22mm (7/8") Handlebars With Internal Handlebar Diameter Between 12mm &17mm. Simply Insert Handguard Spacers Into The End Of Your Handlebar & Tighten. As You Tighten, The Spacer Expands Inside Your Handlebar & Becomes Tight, Locking The Handguards Into Position. NOTE: These Are Universal Fitment - Before purchasing these handguards, please confirm that you have hollow handlebars on your bike to allow for handguard fittings to be inserted. If your handlebars are not hollow, you may be able to use your existing bar end mounting bolts to secure our handguards into place.