Feature: 1. Cooling Connector: There is a heat sink on the linkage of the oil hose and the caliper, which effectively reduces the heat transfer during braking. 2. Quick Adaptation: This resin semi metallic brake pad has shorter adaptation time than all metal one and can quickly achieve the best state. 3. Angle Adjustment: The angle of the hose connector can be adjusted flexibly, the caliper and the hose connector are rotatable, friendly to different frames. 4. Aluminum Alloy Material: Made of excellent aluminum alloy material, light in weight and high in strength, has good durability. 5. Wide Compatibility: The caliper is widely compatible with medium 140 160 180 203mm brake discs, easy to install and reliable to use. Specification: Item Type: Hydraulic Disc Brake Set Material: Aluminum Alloy Tubing Size: Front: Approx. 800mm/31.5in Rear: Approx. 1600mm/63in Braking Direction: Left front, right rear (the oil pipe can be disassembled, and the right front, left rear can be reassembled) Application: Common to A Columns and B Columns A Column Size: Approx. 74mm/2.9in (F160-R140) B Column Size: Approx. 51mm/2in (F180-R160) Rotors: The caliper is compatible with medium 140 160 180 203mm brake discs, original caliper is suitable for 160mm brake discs. If you want to use 180mm or 203mm brake discs, you need to use a brake adapter (original brakes do not include 180mm and 203mm adapters). Package List: 1 x Rear Brake1 x Front Brake2 x Disc (Including 12 Screws)2 x Mounting Column8 x Screw1 x Oil Needle1 x Accessories