Kirschbaum Pro Line II 1.20 is a co-polyester tennis string designed for players who want responsive feel, dependable control, and a relatively comfortable polyester response. Its smooth, round monofilament construction provides consistent ball contact, while the thinner 1.20 mm gauge enhances feel and spin potential compared with thicker versions. This makes it an appealing option for players seeking greater responsiveness without sacrificing the controlled characteristics of polyester strings.
Intermediate to advanced players with medium-to-fast swing speeds who prioritize feel, control, and spin potential. Particularly suited to all-court players and aggressive baseliners who prefer a thinner polyester string and are willing to trade some durability for improved responsiveness.
| String Type | Co-Polyester Monofilament |
| Gauge | 1.20 mm |
| Construction | Round Monofilament |
| Performance Focus | Control and Feel |