57,15 mm x 135,755 mm x 56,007 mm Timken 6375/6320 tapered roller bearings

Tapered Roller Bearings New energy Bearing Manufacturing Co., Ltd offers a 57,15 mm x 135,755 mm x 56,007 mm Timken 6375/6320 tapered roller bearings selection of Genuine Tapered Roller Bearings 3200 Limiting Speed Rating (r/min): at Wholesale 57,15 mm x 135,755 mm x 56,007 mm Prices. We are a 57,15 mm x 135,755 mm x 56,007 mm Timken 6375/6320 tapered roller bearings 20.8 Dynamic Load Rating (kN): Certified Parts Retailer

What is 6375/6320 bearing interchange？