Features: Made of premium aluminum alloy, wear-resistent and corrosion-resistent, durable, light weight, and reduce burden. Can effectively reduce the impact of the entire vehicle, improve ride comfort and the life of various parts of the relevant body. Suitable for mountain bikes, electric bikes, mobility scooter and other bicycles. One-piece oil spring structure, has excellent adjustability while reducing weight. With spring as the main body of shock absorber and oil as the medium, it has a good shock absorber effect. Specifications: Material:Aluminum Alloy Type:125mmx850lbs Type:150mmx1000lbs Type:165mmx750lbs Type:165mmx1000lbs Type:190mmx1000lbs Package Includes: 1x Bike Air Rear Shock note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.