***RPM Limit Grease 13000 rpm ***Dimension D (Outside) 52 mm d (Inside) Bore 25 mm B (Width) 15 mm ***Deep Groove Ball Bearing ISO 9001:2000 ***ABEC Tolerance Codes ABEC1/C3 ***Vibration Level V1 ***Shield/Closure codes 2RS (Two Side Rubber Seal) ***Lubrication: Grease (Wide Temperature Range: - 20 C to 120 C ) *** Each bearing in individual box *