With an elegant design and revolutionary heating core, the quick heating function of the Koso heater grips warm your hands quickly and effectively. Suitable for motorcycles, Scooters, Quads and ATVs with 22 mm handlebars and twist grip. A 5-stage controller allows you to adjust the temperature. The special rubber coating ensures durability and longer service life of the heated grips. Left Inside diameter: 7/8 inch (for 22mm handlebar) internal diameter, right: 1 inch (for twist grip) handle rubber length: 120mm