21,43 mm x 50,005 mm x 18,288 mm 21,43 mm x 50,005 mm x 18,288 mm ISO M12649/10 ISO Bearing

What are the types of 21,43 mm x 50,005 mm x 18,288 mm 21,43 mm x 50,005 mm x 18,288 mm ISO M12649/10 ISO Bearing ? ISO Bearing Manufacturing Service . Get Your Cast Steel Housing Material Free, 21,43 mm x 50,005 mm x 18,288 mm 4 Inch | 101.6 Milli Length Thru Bore Instant UBC Mechanical Electronic Instrument Co., Ltd. price, design review.

What is M12649/10 bearing interchange？