Description This item is a pack of mechanical rear disc brake with some screws which are made of good materials. This rotor has a nice shape and color. It is for long-lasting use, you can buy it with a reasonable price. The electroplating process is and colorful, giving you a different cycling experience. Features -Color: Black -Material: Metal, plastic -Size: About 16.00X16.00X0.10cm/6.29X6.29X0.04inch -Manufactured with high-end material, it has excellent and high durability and practicality for usage. -The hollow design helps the sediment and rainwater to be discharged quickly. -The obliquely long and large hollow design increases the friction coefficient of the disc. -Even if the disc brake is pulled by the line, it can also cooperate with a good braking effect. -This product has multi-spoke support angle design reduces deflection and deformation. Manufactured with high-end material, it has excellent and high durability and practicality for usage. The hollow design helps the sediment and rainwater to be discharged quickly. The obliquely long and large hollow design increases the friction coefficient of the disc. Even if the disc brake is pulled by the line, it can also cooperate with a good braking effect. This product has multi-spoke support angle design reduces deflection and deformation.