YELARXI Bike Ball Bearings, Bicycle Crank Bearing Retainer Stainless Steel Caged Wheel #9-Fitting for (MTB Bike Crank-Bottom Bracket-Frame Bearing) 1/4" x 9 Balls & 4 Pack & Silver

["Serves for: This bike parts beads rack for bike parts replacement, suitable for ordinary bicycles, mountain bikes, stretch bicycles.","Directions for Use: This kind of bicycle bearing is inlaid in the retainer design. It is a bicycle part, which is suitable for replacing the crank bearing of the bicycle.","Attention: The bicycle parts surface could be coated with a small amount of grease to reduce friction when the bearing rotates and prevent corrosion and rust. Will reduce the damage to the machine and extend the service life.","Feature: This ball bearing is made of stainless steel with high precision and smooth surface, which is rust prevention, corrosion resistance, wear resistance and exquisite appearance. Precision steel balls are high hardness, free of cracks and chips, the mountain bike parts could serve for a long time.","Diameter: 6 mm / 0.24 Inch ; Size: 34 x 23 mm / 1.34 x 0.91 Inch (OD x ID); Color: Silver; Material: Stainless Steel; Packing List: 4 Pack x Bearings Steel Ball"]