45 mm x 68 mm x 12 mm 45 mm x 68 mm x 12 mm NKE 61909 NKE Bearing

Various NKE Bearing types Steel Bearing Outer Ring Material and sizes to accommodate your UBC Mechanical Electronic Instrument Co., Ltd. 45 mm x 68 mm x 12 mm 45 mm x 68 mm x 12 mm NKE 61909 NKE Bearing requirements. 45 mm x 68 mm x 12 mm

What is 61909 bearing cross reference？