[wpdatatable id=34 table_view=regular]   [wpdatatable id=35 table_view=regular] NSAR premium 6309 bearings are made in China and 6309 bearing Made of bearings steel,bearings steel with higher and more uniform hardness and abrasion resistance.The most rare is that of bearings steel with ultra-high hardness at the same time,have very strong elasticity.The assurance of hardness can prolong the service life of deep groove ball bearings.