OCCASION??This shock pack includes many features found on higher end shock absorbers. This rear shock absorber is a perfect enhancement to mountain bikes, electric bikes, mobility scooter and other bicycle. PRODUCT SPECIFICATION??High-quality finished surface: CNC alloy material, dark hard-anodized, Coil spring. Bushings: Top bushing size is 8mm x 24mm; bottom bushing size is 8mm x 24mm Note??Please measure the size of your shock for matching before buying Easy to use??High strength and durability.Brand new and high quality bicycle shock absorbers make you more able in the riding process. Note??Please measure the size of your shock for matching before buying