Left (bar side) hole diameter: 7/8" (22mm) | Right (throttle side) hole diameter: 1" (25mm)
Chinese scooters. Universal for most motorcycle, street bike/standard bike/sport bike/dirt bike/naked bike which fit with 7/8" left grip and 1" right grip. Such as Yamaha, Kawasaki, Honda, Suzuki, Harley Davidson, etc.