30% firmer than the original PU400 present in the Premium range. Conceived to adapt to the polyester filaments, the PU HD is more resistant and offers great strength to bind the polyester filaments.
Provides more control over softness to answer the needs of the next generation player. The item "Tecnifibre Duramix HD 1.40mm (black) 200m reel tennis string" is in sale since Thursday, November 03, 2016. This item is in the category "Sporting Goods\Tennis\Strings".The seller is "stringersworld" and is located in Essex. This item can be shipped worldwide.