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.