Features 1、Made of high quality bearing steel material which have strong load-bearing capacity 2、High accuracy steel ball bearings make good rotation speed with low noise 3、Super accuracy raceway improves the stability of the bearing to bring smooth operation and long service life 4、This thrust ball bearing use superb stamping process, have good quality and low price 5、Have multiple uses such as track bearing, automotive bearing and bridge bearing Specification Item Type: Thrust ball bearing Product Model: 51304 Thrust ball bearing Inside Diameter: Approx. 20mm / 0.8in Outer Diameter: Approx. 47mm / 1.9in Thickness: Approx. 18mm / 0.7in Cage Process: Stamping Bearing Material: Bearing steel Scroll Type: Ball Raceway Type: Convex track Sealing Dust Proof Form : 2RS Number Of Scrolling Column: Single Package List 5 x Thrust Ball Bearing