1) High quality control 2) High swiveling accuracy 3) Suitable for high speed 4) Low friction, long service life Products name : 6306 Deep groove ball bearings Brand name : SKF NSK TIMKEN INA FAG Series : 6306 ID size : 30mm-72mm-19mm Cage material : Nylon , steel , brass Precision : PO P6 P5 P4 Sealing : Open Z ZZ RS 2RS. Packaging industrial packaging or as your need.