15mm Hydraulic Rear Disc Brake Caliper Cylinder System With Pad For 70cc 110cc 125cc 140cc 150cc PIT PRO Dirt Bike. Fits for mini ATV quad buggy 4 wheels125cc 150cc Dirt Pit Bike, 90cc Pit Bike. Rear brake assembly including:master cylinder,brake caliper with pre-installed fresh brake pad,brake fluid reservoir,mounting plate Rear disc brake assembly, pre-bled brakes for easy installation. Please check pictures and specifications for compatibility. Quality assurance, unconditional lifetime guarantee, so you can purchase now with confidence. parts is a brand that focuses on dirt, bike, ATV, go, kart and other motorcycle powersports accessories. Our accessories include commonly used replacement parts and personalized modifications. We will update our products all the time, and the parts you need will appear in our shop. If you have any questions about the product, please leave a question or let us know by email, we will answer for you. If