Important: When purchasing, please leave a message about your scooter model in the order! ---Conducive to fast delivery About the model of the scooter? Suitable forKugoo G2 Pro / Kugoo m4 Pro /Kugoo m5 Pro/Langfeite L8/Kaabo Wolf Warrior 11/smartgyro speedway v2 Janobike T10 ----However, the scooter of Kugoo G2 Pro needs to be equipped with gasket before the brake can be installed normally. Please contact customer service for purchasing links ----a few need to add spacers to the adapter to install, we do not provide this kind of spacers, please solve it by yourself ----When purchasing, please remark your scooter model, or send your scooter photos to customer service, which is conducive to rapid and accurate delivery. ----If the brake kit you receive is not suitable, please do not dispute and contact customer service to solve it first. Thank you for your understanding. ----For other scooter models, please contact customer service and send photos of the scooter.We will send you other appropriate purchase links. If you do not consult to purchase, we will not be responsible for your order. About the brake lever? Because the brake lever and the tubing are separated, so you can install the brake lever according to the control direction you want : right brake lever control front left rear, left front right rear, it can be. About oil tubing? the front brake oil tubing length is 1.2m rear brake oil tubing lrngth is 2.1m --The brakes are filled with oil About power-off wire interface? The default wire is a waterproof interface===JULET 2 pin connector (male) . The default is 30 cm. If you need other power-off wire interface, please contact customer service. Not all front wheel brakes of scooters are suitable, please refer to the following conditions. If your scooter is not the following type, and you do not consult us before purchasing, we will not be responsible for your order.