Bolt-on for 1" (25.4mm) diameter handlebars. Polished aluminum. Allows the Motoscope Mini (MSM) digital gauge to be mounted on the handlebars with the Combi Frame bracket (930275 polished or 930276 black anodized). No handlebar drilling required. Comes with the mounting plate and handlebar clip kit with correct length stainless screws. The Combi frame bracket and the Motoscope mini are not included. - 56mm diameter - 60mm long