1、Aluminum Alloy + Spring: Made of high hardness aluminum alloy and electroplated spring, oxidation, corrosion and wear resistant, long lasting durability, reserved adjustable knob, spring pressure can be adjusted by yourself 2、Replacement Parts: Very good after sales replacement parts, canalso be used for modification or maintenance, perfect to replace the original damaged and worn shock absorbers to improve the shock absorption performance of the original car 3、Humanized Design: With damping speed regulation function, spring soft and hard adjustable, spring soft and hard can be adjusted by rotating, adopt humanized design, can be ridden on all kinds of roads and has powerful shock absorption. performance 4、High Strength: The shock absorber is waterproof, can be used in rainy days without worrying about rust, high strength and durability, enhance the shock absorption performance. Reduce road bumps 5、Application: Universally used for electric scooter mopeds with 100mm hole center distance to replace the shock absorbing installation, and can also be used for mini motorcycles and off road vehicles