Stainless Steel Miniature Bearings Deep Groove Ball Bearings ID 3/4/5/6/7/8/9mm
ID: 3/4/5/6/7/8/9mm. Thick: 3/4/5/6/7/8/9mm. Material: Stainless Steel. Dustproof, Anti-foreign Matter, Low Friction Resistance, Fast Heat Dissipation, High Temperature Resistance, Strong Stability, Good Quiet Effect, High Rotation Speed.