Company historyAug., 1993. The factory was built.Jun., 1999. Got ISO9002 certificate.Oct., 1999. Registered ��OL��brand.May, 2001. Become the biggest manufacturer & Seller of China in May, 2001. Apr., 2010. Built new ��OL��bearing pipe mill in Jiangsu P.R.Now, our annual output reach 300,000 tons of ball bearing pipes, size range expanded to O.D 14-130mm.