105 mm x 225 mm x 49 mm 105 mm x 225 mm x 49 mm NKE NJ321-E-M6+HJ321-E NKE Bearing

105 mm x 225 mm x 49 mm 105 mm x 225 mm x 49 mm NKE NJ321-E-M6+HJ321-E NKE Bearing with easy-to-use parts graphics, giving you the ability to Open Type Seals or Shields: check parts availability, NKE Bearing pricing, examine remanufactured options. UBC Mechanical Electronic Instrument Co., Ltd. 105 mm x 225 mm x 49 mm

What is NJ321-E-M6+HJ321-E bearing cross reference？