Description: The pressure can be adjusted by springs. High-performance motorcycle parts. The damper and spring are designed for a long service life. Reduce the shock when riding motorcycles. Easy to install. Specifications: Product Name: Shock Absorber Color: Blue Material: Aluminum + Iron Eye Core Length: 320mm Eye Diameter: 10/12mm Eye Thickness: 20mm Spring Thickness: 7mm Spring Width: 60mm Placement on Vehicle: Rear, Left, Right Installation: The universal length from eye to eye of motorcycle is 320mm. (Please compare with your original before purchasing!) Package Includes: 2Shock Absorber 2Eye Core 1Spring Adjustment Tools Note: 1. We provide clear photos, measurements where possible. Please check as much as possible to make sure the item is exactly what you need. 2. Please allow 0.5-1 inch differs due to manual measurement. (1 inch = 2.54 cm) 3. The color of the actual items may be slightly different from the listing images due to difference computer screen, thanks for your understanding. 4. This package does not include any instruction manual. If you want to know how to use or install it, please contact us by email. We will give you our best assistance.