150mm shock absorber suitable for KuGoo M4 electric scooter rear shock absorber with built-in coil spring rear shock absorber features: High end hydraulic damping -Reduced the impact force of the entire vehicle, greatly improving ride comfort. High quality materials -Imported materials, specially crafted to ensure shock absorption, firmness, and wear resistance. Durable oil seal with smooth welding -Using durable oil seals, welding is smooth and more durable. Exquisite electroplating and painting techniques -The surface is deeply electroplated and painted to ensure a smooth surface, increasing the anti-corrosion and antioxidant capabilities of the shock absorber. The order includes: [1 pair of shock absorbers] [a shock absorber] Note: We provide clear images for measurement when possible. Please check as much as possible to ensure that the item is what you need. Due to manual measurement, please allow a difference of 0.5 to 1 inch. (1 inch=2.54 centimeters) There is no description in this toolkit. If you would like to know how to use or install it, please contact us via email. We will provide assistance as much as possible. Due to differences in computer screens, the actual item colors may differ slightly from the list images. Thank you for your understanding.