Zhenglong bearing factory is a special bearing of China .Our main product had passed ISO9001:2000Quality system.Our main product as follow : 1.Spherical roller (21000, 22000, 23000, 24000, 29000 Series) 2. Tapered roller (30000 series and Inch Size). 3. Thrust Bearings. (50000series) 4. Pillow Block, (UCP, UCF, UCFL) 5. Low-noise deep groove ball bearing (mostly 6000 series) professional bearings factories in China. 6.hub wheel bearing More information you can visit our web http://www.zl-bearing.com Any inquire pls feel free to inform us through z3h2y1#yahoo.com.cn your inquire always meet with our careful attention! MSN:mickey.6699#yahoo.com.cn Looking forwards your reply ! Best regards Helen