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| Material | 100% Zyex® Monofilament |  
| Gauge | ZX Pro: 17 (1.22 mm) ZX: 16L (1.27 mm)
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| Length | 40 ft (12 m) set / 360 ft (110 m) reel /
 720 ft (220 m) reel
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| Colors | Natural and Black |  | Exceptional Dynamic Stiffness: Dynamic stiffness provides playability similar to natural gut
 
 Zero Polyester:
 Absence of polyester increases elongation and decreases string bed stiffness
 
 Dynamic Spin:
 Optimum spin and resilience at all swing speeds
 
 Minimal Tension Loss:
 Zyex (polyketone) maintains tension better than polyester or nylon (polyamide) strings
 | Usage: Top amateur and professional players
 
 Players looking for the power and comfort of natural gut at less than half the cost
 
 Players that find polyester monofilaments too boardy
 
 Stringing tension:
 Up to 60 lbs (27 kgs)
 
 ZX Pro:  use 5-10% less tension than traditional nylon strings
 ZX:  Use 10-15% less tension than traditional nylon strings
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