Main points before buying* This pad can be equipped on VSETT 10+/11+, ZERO 8X/10X/11X both front & rear original brake calipers, Speedual/Speedual Mini/Speedual Plus both front & rear original brake calipers, Grace/Zero 10 only rear original brake caliper, Minimotors Dualtron Thunder both front & rear original calipers, and other scooters equipped NUTT hydraulic brake system. And maybe other scooters can equip this one, please check the original pads, if the size and the shape are the same as ours, so they are universal.SEMI METAL DISC BRAKE PAD*High quality resin base *Kevlar synthetic fibers *Ultrafine metal powder30% *Service life3000km(Lab data, the real performance would be shorter)FULL METAL DISC BRAKE PAD *High copper content base *Ultrafine powder mixing of Copper, Zinc and Ceramics *Forming in high temperature and high pressure *Service life8000km (Lab data, the real performance would be shorter)_x000D_