components: padssize: a: 34.6*31.6*4 b: 29*39*4mmproduct name: mountain bike brake partsplate color: blackcertificate: iso9001: 2008material: non-asbestos, semi-metallictype: brake padproduction permit no.: XK08-003-00031production standard:)slots: can be customizedservice life: 9000-20000 km accordinglyfriction coefficient: 0.40u-0.45u