Powerful New Generation of STS developed to comply with new Speed glue rules.
STS is well known for giving 2/3 of tension energy to spin and 1/3 to speed.
Xtend HS has been re-designed to deliver even greater power.
To comply with the ban on speed gluing, Yasaka has developed a powerful new tension rubber.
The top sheet and sponge have been completely re-designed by ground breaking new technology.
It delivers high-power speed with easy handling.
Please do not apply speed glue, as it will destroy the rubber.