Product Details: Name: Bicycle Mechanical Disc Brake Disc Disc brake rotor: diameter 160mm Features: Waterproof and dustproof, fully sealed caliper Mechanical locking, rapid braking, safe and convenient, thickened brake pads, strong friction force, powerful braking, capable of quickly gripping the brake disc to bring the brakes to a rapid stop Rotary disc brake pads, 1 piece, 100 pieces, 48cm*31cm*18cm, weight 15kg Cassette disc brake pads, 1 piece, 200 pieces, 34cm*34cm*11cm, weight 24kg