Our Company Cutomer before used NSK products GB 40779 SO1. But because of the expensive price of NSK products, delivery time is longer, and the current market economic downturn,After discussion with our company,So decided to purchasing 2 pcs sample to used in last year, Now after one year test, Our Customers feel our products is not worse than the quality of NSK products, so this year directly ordered 50 sets of GB 40779 SO1, the product marks our bearing excavator continues to be recognized by foreign customers, product quality is excellent.