Tecnifibre Black Code 17G Black Tennis String (Set) - paddlepro
RPM blast Best Co-Polyester Tennis Strings for Spin and Control
Tier One Sports Europe | Strike Force RIP Reel (200 Meter - 0.58 € /1 Meter - inc VAT, plus shipping) Performance Tennis Strings
Polyester Tennis Strings | The Definitive Guide & Best Picks
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