Specification: Name: MBM adjustable built-in rear shock absorber -320mm Material: T6063 national standard aluminum alloy + high quality spring Process: CNC precision numerical control Color: red/blue/gold/orange/purple/ green. Center distance: 320mm/ 12.5"'" Mounting hole diameter: 10mm Spring diameter: 7mm Spring width: 65mm Unit: the price of one piece (if you want one pair, please buy 2 pieces) Applicable: 150 pounds Supporting: electric vehicles, scooters, motorcycles, electric motorcycles Features: 1.built-in airbag, 18 Segment adjustable damping. 2. Spring hardness is adjustable, 3. The spring stroke is adjustable. Package Included: 1 rear shock absorber. note: 1. Please compare the installation dimensions of the original car before purchasing. 2. Due to manual measurement, please allow an error of 1-3mm. Make sure you don’t mind bidding. 3. Due to changes in the light environment, there is a color difference between the color of the product and the actual product, please prevail with the actual product, thank you! 4. Import duties, taxes and fees are not included in the commodity price or transportation costs, these costs are the buyer"'"s responsibility. Please check and contact the customs of your country/region to determine what these additional costs are before bidding/buying.