Two-way brake system: Pushed by 4 pistons,the 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.

Features:
Left/Right brake lever fit for 22.2mm handlebar.
Hydraulic 4 pistons and two-way brake prolong the life of rotor.
Integrated brake lever and oil tube prevent oil leak.
Suitable for most mountain bikes.

Specifications:

Model: Front Brake / Rear Brake / Front&Rear Brake / Front Brake&Rotor / Rear Brake&Rotor / Front&Rear Brake&Rotor (optional)
Material: Aluminum alloy + Stainless steel
Front Oil Tube Length: 800 mm / 31.5 in
Rear Oil Tube Length: 1400 mm / 55.1 in
Applicable Handle Diameter: 22.2 mm
Applicable Rotors Size: 160 mm
Package Weight:700g / 24.7 oz
Package Size: 25 * 20 * 7 cm/  9.9 * 7.9 * 2.8 in

Package List:
1* Front Hydraulic Disc Brake
1* Rear Hydraulic Disc Brake
4* Long Screw