Fits Coolster ATV Models: 3125XR8 / 3125XR8-S / 3125XR8-U / 3125XRU-US.Rear Shock Absorber for most Chinese 70-150cc ATVsMounting Hole Diameter: 0.4 ″Mounting Hole Distance: 11.81″Please check pictures and specifications for compatibilityPlease check pictures and specifications for compatibility