... ,large stock Detailed Description : 2013 High Precision Ball Bearing NSK 6304Z Deep groove ball bearing mainly take radial load as ... , less vibration and noise, less energy consumption, high limiting speed, large size range and variations of structure ... . Model No. 6304ZCategoryDeep Groove Ball BearingSpecification20*52*15mmMaterial TypeBearing steel,Carbon steel,Stainless ...