1.self-aligning ball bearing 2.high speed, low noise 3.good quality and competitive price 4.certificate:ISO9001:2000 Thrust TypeBall Brand NameXKV Bore Size150 - 670 mm Outside Diameter190 - 800 mm Model Number52240 Precision RatingP0,P4,P5,P6 Seals TypeNon seal Number of RowSingle Row Place of OriginShandong, China (Mainland) MaterialGCr15 , GCr15SiMn Cage MaterialSteel,brass VibrationV1,V2,V3, ...