1. Tubing Parameters: Front tubing is 800mm/31.5in long, and the rear tubing is 1450mm/57.1in long.2. Usage Scenes: Whether you are climbing, off road, jungle, urban leisure driving, you can easily control it.3. Applicable Model: Brake handle mounting telescopic adjustable diameter, tightening screw, 25mm suitable for most models on the market.4. Brake Pads: Made of resin metal composite materials, the is and flat, will not damage the brake disc, and there is no noise during braking.5. Four Piston Mountain Bike Disc Brake: Bilateral hydraulic disc brake, compared with the same of double piston brake, the braking force is increased by 20%, and the resistance wear is increased by 150%.Specification:Item Type: Mountain Bike Hydraulic Disc BrakeMaterial: Aluminum AlloyWeight: Approx.779g/27.5ozBraking Direction: Left Front, Right RearTubing: Front Tubing Length: Approx. 800mm/31.5in, Rear Tubing Length: Approx. 1450mm/57.1inFront Brake F160/R140, F160/R140 F Stands for the Front, R Stands for the Rear, and 160 and 140 Refer to the Disc Diameter (mm).Rear Brake F180/R160, F180/R160 F Stands for the Front, R Stands for the Rear, 180 and 160 Refer to the Disc Diameter (mm).packing list:1 x Front Brake1 x Rear Brake8 x Screw2 x Olive Head2 x Oil Needle2 x Mounting ColumnNotice:Brake handle mounting telescopic adjustable diameter, tightening screw, 25mm suitable for most models on the market.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.