| Inner Diameter | 4 mm |
|---|---|
| Outer Diameter | 10 mm |
| Thickness | 4 mm |
| Models | W638/4R-2Z, W638/4X-2RS1, W638/4X-2Z |
| Lubrication | Grease or Oil |
| Origin | China |
Precision miniature deep groove ball bearings with high grease technology, rich stock, 100% on-time delivery, and fast response (<0.5h). Suitable for OEM/ODM applications.