YONEX POLYTOUR REV 125 - SET Unleash powerful spin with POLYTOUR REV 125 tennis string. Its 8-sided shape grabs the ball for intense bite, while the thicker gauge increases durability without sacrificing spin. SIF (Silicone Infused Filament) technology enhances precision and feel. Ideal for baseliners seeking long-lasting performance with control. Specs More Information Color(s) Mint, Purple, White, Bright Orange Gauge 17 (1.20mm), 16L (1.25mm), 16 (1.30mm) Length Set (12 m) / Reel (200 m) Material Polyester (Octagon Monofilament) Made In Japan Item Code SET (12m): PTGR120; PTGR125; PTGR130REEL (200m): PTR120-2; PTR125-2; PTR130-2 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.