Billet aluminum housing; with two pre-wired stainless momentary push button switches; curved to follow handlebar contours when installed. Can be used as horn; starter or turn signal switch. Mounts directly to the handlebar. Offers a perfect seamless fit on 1" diameter bars and will show a little ''air gap'' on the smaller 7/8" (22mm) bars; an aesthetics issue if anything. Approx. dimensions: Body 21.2mm high x 51mm wide. Switch head; without bezel Ø 11.9mm; switch head with bezel approx. Ø 17.5mm; switch knob housing Ø 7.9mm with 5/16"-24 threads.