| Material | Cast or ductile iron |
| Hardness | HRC 50-60 |
| Tolerance | H7 |
| Roughness | RA0.32um |
| Concentricity | 0.02mm |
| Vertical | 0.04/100mm |
| Plating | Anti rust oil |
| Package | bubble bag |
| Application | Hydraulic cylinder |
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