Specs for Wilson Ultra 105S Countervail
| Strung weight | 10.7oz / 303.34g |
| Balance | 4 pts Head Light |
| Head size | 105 sq. in. / 677.42 sq. cm. |
| Stiffness | Very high - 80% (71 RA) |
| Recommended tension | 50-60 pounds |
| Swing weight | 315 kg · cm2 |
| String pattern | 16 Mains / 15 Crosses Mains skip: 7T,9T,7H,9H One Piece No Shared Holes |
| Length | 27.25in / 69.22cm |
| Beam width | 26mm / 27mm / 26mm / |
| Composition | Carbon Fiber/Countervail |
| Power level | Medium |
| Stroke style | Medium |
| Swing speed | Medium |
| Colors | Blue |
| Grip type | Wilson Sublime |