Comparison : Item # 6000, 6000 Series Deep Groove Radial Ball Bearings
Item # 6001, 6000 Series Deep Groove Radial Ball Bearings
Item # 6002, 6000 Series Deep Groove Radial Ball Bearings
Item # 6003, 6000 Series Deep Groove Radial Ball Bearings
Item # 6004, 6000 Series Deep Groove Radial Ball Bearings