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Intense bite and control from SIF technology* (Silicone Infused Filament).

This Yonex string is for baseliners with medium-to-fast swing speeds looking for a shaped string (8-sided) that grabs onto the ball for the ultimate spin experience.

*SIF technology is developed in cooperation with NANODAX

• Gauge 16L (1.25mm)
• Made in Japan
• Pentagonal structure
  

Silicone Oil Infused Filament Technology

SIF

This new Silicone oil Infused Filament (SIF) technology - monofilament infused with silicone oil - allows big hitters to experience ultimate spin from intense snapback speeds. Greater snapback produces a powerful spin.

SIF Technology with unique pentagonal structure allows the string to move faster than conventional models, increasing spin. 

Equipment used by:

• Donna Vekic - Croatia
• Gustavo Fernandez - Argentina
• Tamara Zidansek - Slovenia
• Nao Hibino - Japan