Features1Prime Material: The brake disc is made of sturdy stainless steel material, lightweight and durable, not easy to damage. 2High Stability: These brake discs are not easily deformed, rust proof and non fading, stable in use, bringing good use experience. 3Good Heat Dissipation: Reduces the buildup of brake dust on the wheels, and air circulates around the brakes to help dissipate heat. 4Easy to Install: The brake disc style is new, to protect your bike, electric bicycle conversion accessories, simple and convenient installation. 5Good Performance: With ventilated disc brake system, efficient braking, quick response, safer and more worry free riding and improved riding experience.SpecificationItem Type: Brake DiskWeight: 145g / 5.11ozProduct Material: Stainless steelProduct Application: For MI4 PRO electric scooterPackage List1 x Brake Disc5 x Screw