Two-way brake system: Pushed by the piston, the two bike brake pads will clamp the disc rotor to brake from both side,which prevent the rotor from deformation so as to prolong its life.Hydraulic two-way brake set is suitable for mountain bike.<br/>Features:<br />Left/Right brake lever fit for 22mm handlebar.<br />Fit for 160mm bike rotor(not include).<br />Aluminum alloy construction for durability.<br />Hydraulic piston two-way brake prolong the life of rotor.<br />Integrated brake lever and oil tube prevent oil leak.<br />Suitable for most mountain bikes.<br/>Specification:<br />Color: Black / Red / Silver (optional)<br />Material: Aluminum alloy<br />Front Oil Tube Length: 80 cm / 31.5 in<br />Rear Oil Tube Length: 140 cm / 55.1 in<br />Applicable Handle Diameter: 22 mm<br />Applicable Rotors Size: 160 mm<br />Weight: approx. 426 g / 15.0 oz (for a pair)<br/>Package List:<br />1* Front Hydraulic Disc Brake<br />1* Rear Hydraulic Disc Brake<br />4* Screw<br />1* Mounting Adapter (for rear hydraulic disc brake)