The Kirschbaum Pro Line Black is a tournament-grade co-polyester racquet string backed by 20 years of manufacturing expertise. Built for competitive players who need a reliable balance of power, control, and spin potential with consistent string bed performance across full match schedules. Available in 18L (1.15mm), 18 (1.20mm), 17 (1.25mm), and 16 (1.30mm) gauge. Key Features Constant Dynamic Response: Maintains consistent string bed feel shot after shot — your racquet performs the same in the third set as it did at the start. Excellent Tension Maintenance: Holds tension longer than standard co-polyesters, keeping your setup predictable across multiple sessions between restrings. Power and Spin Potential: Delivers pace on aggressive groundstrokes and serves while giving you the bite needed to generate spin on topspin shots. Precise Control: Keeps fast, hard shots on target during baseline exchanges — confidence to swing fully without losing placement. Four Gauge Options: 18L (1.15mm) for maximum feel and spin, 18 (1.20mm) for added responsiveness, 17 (1.25mm) for a balanced all-around performance, or 16 (1.30mm) for players who break strings frequently. Specifications Brand: Kirschbaum String Family: Pro Line Material: Co-polyester Color: Black Gauge Options: 18L (1.15mm), 18 (1.20mm), 17 (1.25mm), 16 (1.30mm) Who It's For Tournament and competitive players who need dependable power, spin, and control from a string with a proven track record Players who prioritize tension stability and want consistent performance across multiple sessions without frequent restringing Aggressive baseliners who swing hard and need a co-polyester that holds its feel under repeated high-pace contact Players who string at multiple gauges and want the flexibility to fine-tune between feel and durability
