2PCS 125mm Rear Shock Absorber Adjustable Damping High Hardness Suspension Damper for Electric Bike ATV Go Kart Scooter Mountain Bike 1Universal Fitment: Suitable for electric bikes, scooters, and assistive vehicles with a hollow distance of 125mm, can also be used on mini motorcycles and off road vehicles. 2Adjustable Damping: With adjustable knob design, which allows user to adjust the spring pressure manually according to riding conditions for enhanced comfort and optimal performance. 3Premium Material: Made from high hardness aluminum alloy and stainless steel springs with an electroplated surface, anti oxidation, anti corrosion, and resistance to wear. 4Versatile Functionality: These shock absorbers serve as excellent part replacements or upgrades, enhancing the ride comfort and shock absorbing performance of your vehicle in various terrains. 5Ideal Replacement: Replacement part that can be used for modifications or repairs, could significantly enhance your vehicle's shock absorbing performance, ensuring a smooth ride on all types of terrains.