| Spec | Wilson Ultra 99 Pro | Yonex EZONE 100 |
|---|---|---|
| Weight (unstrung) | 305g | 300g |
| Head Size | 99 sq in | 100 sq in |
| Balance | Head Light | Head Light |
| String Pattern | 16x18 | 16x19 |
| Swingweight | 330 | 310 |
| RA Stiffness | 71 | 65 |
| Strung Weight | 330g | 325g |
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