In general, Original NTN bearing has its own specialized designer who designs the external packaging and arranges the factory whose manufacture conditions reaching the standard to produce. So, the packing is very clear, no matter the line or the color. It is unambiguous that some parts of NTN brand accessories with unique design packing which is to protect their intellectual property rights. Another way for test, holding the NTN bearings inner sleeve with left hand, and toggling the outer ring to make it revolved with right hand, and then hear if it has noise. As most of the counterfeit products' production condition is backward, totally manual mill type operation, sand kind impurities will be mixed into the bearings and hid in the bearings body in the production process, the counterfeit products will with noise when rotating. At present, our antirust technology is not mature, so it's easy to leave thick smear on hands when do antirust treatment for the bearing body, and feel thick when holding the fake. While for the foreign original NTN bearing, you almost can't see antirust oil traces on it. There are experts who are particular care said that NTN import bearing has a smell, it is sure that NTN bearing used anti-rust oil which can’t be seen.