Function: Made of premium aluminum alloy, durable and excellent braking performance. Used for mini gas or electric carts, ATVs, 4 wheel mini scooters and SUVs. Reliable braking capability. It has good heat dissipation and is resistant to heat attenuation during high-speed braking, so it has good high speed braking effect. Brake is stable, no noise or shock. Continuing braking will not degrade and brake will not work. Specifications: Material: Aluminum Alloy Disc Diameter: 140mm / 5.51in Disc Center Hole Diameter: 29mm / 1.14in Color: Black Brake Caliper + Silver Brake Disc Package List: 1 x Brake Disc 1 x Brake Caliper