Features: 1.Material: Made of high hardness steel, CNC aluminium alloy and high performance springs, with oxidation resistance, waterproof and wear resistance, for long term durability. 2.Function: The suspension damper will provide a smoother ride and better overall damping management for improved ride comfort. 3.Adjustable Spring: The suspension shock damper with adjustable spring, can adjust the strength that suits you best, to deal with different road conditions. 4.Dimensions: Mounting hole diameter approximate 10mm/0.39in, hole center distance approximate 250mm, spring diameter approximate 12mm, overall length approximate 270mm. 5.Fitment: Fits for most of the Chinese brands ATVs and Go Karts , such as for TaoTao, for Buyang, for Coolsport, for Lifan, for Tank, for SUNL, for Redcat, for Eagle, etc. Specification: Item Type: Shock Absorber Material: CNC aluminum alloy, steel, spring Total Length: Approx. 270mm/10.63in Mounting Hole Center Distance: Approx. 250mm/9.84in Hole Center Inner Diameter: Approx. 10mm/0.39in Spring Diameter: Approx. 12mm/0.47in Mounting Hole Thickness: Approx. 20mm/0.79in Spring: Adjustable (Be sure to use a adjustment tool) Fitment: Fits for approximate 250mm/9.84 mounting hole distance for motorcycles, ATVs, off road vehicles, scooters, etc. Fit for most 70cc 90cc 110cc 125cc 150cc dirt pit bike ATV go cart scooters and moped quad, and fits many other bikes with similar dimensions and poundage. Fits for most of the Chinese brands ATVs and Go Karts, such as for TaoTao, for Buyang, for Coolsport, for Lifan, for Tank, for SUNL, for Redcat, for Eagle, etc.