20 mm x 47 mm x 14 mm 20 mm x 47 mm x 14 mm ISB NUP 204 ISB Bearing

ISB Bearing offers a 20 mm x 47 mm x 14 mm 20 mm x 47 mm x 14 mm ISB NUP 204 ISB Bearing selection of Genuine UBC Mechanical Electronic Instrument Co., Ltd. ISB Bearing at Wholesale 20 mm x 47 mm x 14 mm Prices. We are a 20 mm x 47 mm x 14 mm 20 mm x 47 mm x 14 mm ISB NUP 204 ISB Bearing Certified Parts Retailer

What is NUP 204 bearing interchange？