120mm grip length. Inside grip diameter: One side 7/8" (22mm) and other side 1" (25.4mm). 12V. Black. Plug & Play. Comes with an integrated push button thumb switch used for controlling on/off and the 5-step colored LED displayed heat levels green (coolest) blue yellow orange and red (warmest). A low-voltage battery protection system (11.5V or lower) will automatically shut down grip heating to prevent starting problems. For 7/8" handlebars