True bearing consistent with the use of the name, type and technical specifications; does not allow a 1-micron or 0.1 microns in error; bearing materials using high-quality, high cost of bearing steel materials to ensure Cylindrical Roller Bearing Tapered Roller Bearing the quality, transport Process would take special care. Bearing the appearance of fake and genuine, but its bearing capacity, speed limits, and so I wonder if it is consistent with the purposes; to reduce manufacturing costs, the accuracy without any requirement for lower prices, the use of poor quality bearing steel materials, packaging, The treatment of non-standard, bearing products have a negative impact on the accuracy, the bearings will be in use early damage.