2 mm x 7 mm x 2,5 mm ZEN 602 ZEN Bearing

LET OUR 2 mm x 7 mm x 2,5 mm ZEN 602 ZEN Bearing EXPERTS 3600 rpm Grease Speed Rating n1 GET AD Bearing Machine Co., Ltd 2 mm x 7 mm x 2,5 mm YOU THE PARTS YOU NEED.

What is 602 bearing cross reference？