| Material | 
18 Soft: Zyex® Multifilament 
17 Natural: Zyex® Multifilament 
16 Tough: Zyex® Monofilament | 
 
| Gauge | 
18 (1.15 mm) 
17 (1.25 mm) 
16 (1.30 mm)
 | 
 
| Length | 
 40 ft (12 m) set /  360 ft (110 m)  reel | 
 
| Colors | 
18: Blue 
17: Optic Green 
16: Black | 
 
 
 | 
Zyex core increases power and resilience
   
Zyex core prevents tension loss 
   
18 Gauge: 
Zyex multifilament core maximizes softer feel and resilience
  
17 Gauge: 
Zyex multifilament core provides optimum combination of power and durability
  
16 Gauge: 
Zyex monofilament core maximizes durability and string life | 
Usage: 
Top professional and amateur players
  
Players looking for minimal tension loss and consistent performance
  
 Stringing tension: 
18 Gauge: 
Up to 55 lbs (25 kgs)
  
17 Gauge: 
Up to 60 lbs (27 kgs)
  
16 Gauge: 
Up to 60 lbs (27 kgs)
  
Use 10-15% less tension than traditional nylon tennis strings |