... rise 3.good seal performance china tension pulley bearing Corresponding Type: VKM13100,VKM13201,F-121287.5,QTT100,S400 ,S507,IR-9811 ... F-39752.2,F-120959.1.1, The material of inner rings, outer rings and balls are adopted high purity of bearing ... resistance, bounce impact force and inflaming retarding.china tension pulley bearing • Tensioner & Idler Bearings • Clutch Release Bearings • Hub Wheel ...