30 x High Precision Steel Balls Universal Bicycle Bearing Cage (4.5 mm)

30 pieces of high quality precision steel balls; Universal use: DIY, cycle, ball cage (bottom bracket, front or rear hub, headset, pedals...), model making; We recommend using grease when assembling the balls to prolong the service life; The balls are made of quality steel for cycle bearings;, Manufacturer: cyclingcolors