Features: Make from aluminum alloy, light weight, Enduring, providing long terms durability and reliability. Properly space disc brakes ensure smoother and more efficient braking. These spacers can quickly and easily installed, allowing you to back on the trail in no time. Choose from 2, 3, 4, 5, or 6mm spacers to perfectly adjust your mountain bike disc brakes. These spacers adds a fashion touch to your bike while maintaining fine look that complements any color scheme. Specifications: Materials: Aluminum alloy Style: 2mm with screws/3mm with screws/4mm with screws/5mm with screws/6mm with screws Size: as shown in the picture Package Includes: 1pc Electric Scooter Brake Disc 6pcs Screws note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.