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Amazon.com : Tier One Sports Firewire Boost - A Hybrid Co-Poly/Co-Poly Tennis String for Ultimate Ball Bite (Set - Red/White, 16 Gauge (2 x 6.8 m Sets)) : Sports & Outdoors
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Amazon.com : Tier One T1-Firewire Co-Polyester Tennis String (Black, 16 Gauge (1.30 mm) - 200 m Reel) : Sports & Outdoors
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Amazon.com : Tier One Ghost Wire Soft co-Polyester Tennis String (Reel - White, 16 Gauge (1.27 mm) - 200 m Reel) : Sports & Outdoors
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