Includes 4 replacement 17x30x7 6903 blue Ball Bearings
Lubricated with Grease, Chrome Steel 52100 (GCr15) ABEC 3 Precision Races, Hard Chrome Steel 52100 (GCr15) Balls
Used in RC Models, BIke Hub
Rubber Sealed Ball Bearings have maximum protection, and are ideal for off-road racing. They protect well against exposure to dust, dirt, and moisture, which can destroy bearings