Dear sir, We have learned your message from Now we will take a liberty to introduce ourselves to you that Zhenglong Bearing Factory is a special bearing manufacturer of product had passed ISO9001:2000 quality main product as follow: 1) deep groove ball bearing 2) tapered roller bearing 3) thrust ball/roller bearing 4) cylindrical roller bearing 5) rub wheel bearing 6) pillow block bearing and so on More information you can visit our web: If you have any inquire pls feel free to tell us through that your inquire will always meet with our careful attention. Looking forward to cooperate with you early! Sincerely yours, Mr.xie zhengui Linqing Zhenglong Bearing Plant, located in the industrial zone of Yandian country Linqing city, is one of the largest bearing manufacture in northwestern Shandong in 2000.With about 200 workers, 20 of which are technical staffs, annual output of the plant hit 4 million sets. With advanced technologies , equipments and test measures, we mainly manufacture deep groove ball bearings, self-aligning ball bearing, tapered roller bearings in metric and inch size.angular contact ball bearings, spherical ball bearings company already through ISO9001:2000 quality system products are popular in every corners of and Quality are the basic principls of us , We would be highlp appreciated for your coming and cooperation.