Coomeng Zoom H876E 4-Pistons E-Bike Electric Power-Off Hydraulic Brake Set With Product Details Please confirm the following 2 questions before purchasing: Is the length of the hose sufficient? Are the connectors of the power-off wires matched? Be sure to confirm it clearly, if you can't confirm it yourself, please leave your question at any time. 4-pistons E-bike hydraulic disc brake set, compared with the same level of double-piston brake set, the braking force is increased by 25%, and the wear resistance is increased by 150%. Whether you are climbing/off-road/jungle/urban leisure riding, it can easily cope with it. The 22.2mm brake handle caliber design is suitable for 99% of the bicycle handlebars on the market. The brake pads are upgraded with resin brake pads, which will not damage the rotors. The normal size makes replacement more worry-free. Brand: ZOOM Name: 4-piston hydraulic disc brake Model: HB876E Power-off waterproof interface Colour:Red/black Material:Aluminum alloy Rotor: 180mm * 2pcs Power-off line connector type: 2-pin The length of rear hose: 1600mm The length of front hose: 900mm Powerful braking force: Each brake caliper is equipped with 4 pistons to achieve fast braking and escort every ride. Designed for E-bikes: Equipped with brake automatic power-off sensor, using 2-pin connector. When braking, the power output is automatically cut off to quickly realize braking. Sufficient length of hose: Front brake hose length - 900mm (35.5in), rear brake hose - 1600mm (63.0in). Before purchasing, please confirm the required hose length to avoid the situation that cannot be installed. Larger rotors and More durable pads: The set is equipped with the original 180mm rotors, which have stronger braking performance than 160mm rotors. At the same time, the set is equipped with the original universal pads, which is compatible with SHIMANO BR-M8120/M7120/M6120M8020/M820/M810/M640MT520/MT420 Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.