Amazon.com : Tier One Sports Black Knight - Co-Poly Tennis String for The High Performance Player (Reel - Black, 15 Gauge (1.33 mm) - 200 m Reel) : Sports & Outdoors
Tier One Sports T1-Firewire - Co-Poly Tennis String for Ultimate Spin (Reel - Red, 18 Gauge (1.20 mm) - 200 m Reel)
15L SIGNUM PRO Poly Plasma 1.33mm 12mt/40ft Set Tennis String