Baoblaze Disc Brake System Bike Disc Brake for Mountain Bikes Maintenance Front160 Round Hole.The bike disc brake caliper is made from high strength aluminum alloy and steel, which is durable, high quality, and not easy to wear and tear.Disc rotor has excellent heat dissipation properties and multiple holes for faster cooling, reducing heat decay and ensuring safety.Easy to install, has good breaking power, precise positioning of brake pads to achieve an ideal brake feel, and operates quietly.Mechanical Disc Brake System set, providing a complete for your brake system upgrade.This disc brake set is for universal s, mountain bikes, and road bikes, suitable for a wide range of models.Disc Brake System Bike Disc Brake . Disc Brake Caliper Brake Brake. Aluminum Alloy Hydraulic Disc Brake Bolts. Mountain Bike Mechanical Hydraulic Disc Brake . Road Bike Cycling Repair Component Maintenance.