50 mm x 130 mm x 31 mm ZEN 6410 deep groove ball bearings

Deep Groove Ball Bearings offers a 50 mm x 130 mm x 31 mm ZEN 6410 deep groove ball bearings Huaxin Bearing Co., Ltd selection of Genuine Deep Groove Ball Bearings at Wholesale Prices. We are a 50 mm x 130 mm x 31 mm ZEN 6410 deep groove ball bearings Certified Parts Retailer 50 mm x 130 mm x 31 mm

What is 6410 bearing cross reference？