ZTTO MTB 4 Piston Hydraulic Disc Brake M840 With Cooling Full Meatal Pad CNC Tech Mineral Oil For AM Enduro Bicycle E4 ZEE M8120 Brand: ZTTO Colour: Black Material: 6061 aluminum alloy Installation caliber: 22MM Applicable models: mountain bikes, folding bikes, handlebar diameter 22MM Finger grip size: 8cm Product accessories: none Product weight: 370g Product size: rear oil disc cable length 135cm Reminder: We are here to serve you wholeheartedly. If you have any purchase questions, the customer service will answer you online. Specifications: 1. Flexible control: ZTTO hydraulic oil brake has strong maneuverability and is not affected by weather changes, safe and stable. 2. High-quality materials: 6061 aluminum alloy forging, with resistance to cold, heat and oxidation, not easy to deform, suitable for long-term riding. 3. Ergonomic design: the required strength is small, the fingers and arms are not easy to feel tired when going downhill for a long time, and the hands are not easy to damage. 5. Multi-purpose design: the handlebar diameter is 22MM, and the standard diameter mouth is suitable for most mountain bikes and folding bikes. Package Included: 1*Hydraulic Disc Brake