Features: 1. Note: Before installation please do not remove the orange blocks and squeezes the brake levers. Otherwise it will cause oil leakage or scrap the oil disc. 2. Front clamp (AB column universal conversion seat). Rear clamp (AB column universal conversion seat) 3. Using all metal to make brake pad: excellent performance high temperature load capacity suitable for high-intensity riding adapt to various weather riding environment. 4. Suitable for electric scooter folding bike and so on. 5. Made from high quality and durable aluminum alloy. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. 2. Objects may have Logo if you want to know please contact us. If you mind please do not bid. Specification: Material: aluminum alloy Suitable size: 12 inch/14 inch Weight: front brake assembly 426g rear brake assembly 500g Oil pipe length: front oil brake extension oil pipe 850mm. Rear oil brake extension oil pipe 1600mm Suitable for disc brake disc series: aperture 44mm diameter 140mm or 160mm Applicable disc: 160mm Note: The frame must have disc brake holes and the motor must have threads or disc brake holes includes: Choice 1: 1 x Right Front Hydraulic Disc Brake Kit Choice 2: 1 x Left Rear Hydraulic Disc Brake Kit Choice 3: 1 x Right Front Hydraulic Disc Brake Kit 1 x Left Rear Hydraulic Disc Brake Kit "