| Parameter | Specification |
| Outer Diameter (OD) | 6 – 24 mm |
| Inner Diameter (ID) | 3.1 – 10.02 mm |
Material thickness | 0.5–2.0 mm |
| Material | 65Mn / SK5 / SK7 |
| Hardness (HRC) | 43 – 50 |
| Surface Treatment | Eco-friendly nickel plating, electroless nickel plating, black oxidation, zinc-nickel alloy plating |
| Function | To protect the main body of the rotating shaft |




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