The YonexPoly Tour Fire 120 Tennis String is a great string for big hitters looking for extra spin potential and precision shot making. 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 allows the string to move faster than conventional models, increasing spin.

Construction: Monofilament Polyester with high polymer polyester

Color: Dark Red

Gauge: 17G (1.20 mm)

Length: 660′ (200 m)

For more info on the Yonex String, click the links below:

Yonex: Strings and Things

A Meeting with Mark Gonzalez: Yonex Australian Open Stringer and Texas Rep

Need help selecting a string? Check out our Choosing The Right Tennis String Guide for more assistance.