Under Armour Seamless Stride Long Sleeve Men's COLLECTION-Additional-Tennis Balls and Related Quick Action rotating swivel string

Quick Action rotating swivel string clamp bases

The tube is capped on the bottom with a plastic cap for setting in concrete

This is the preferred string and gauge used by Spanish tennis phenom Rafael Nadal

Comes with a zippered carry case and cleaning cloth

Can be used to release the calves

Under Armour Seamless Stride Long Sleeve Men's COLLECTION-Additional-Tennis Balls and Related Quick Action rotating swivel stringUsing levels of mesh mapped to your body, the Under Armour Seamless Stride Long Sleeve gives you ventilation where you need it. Fewer seams give you distraction free comfort during your activities. New, softer knit fabric with engineered mesh ventilation, mapped to the places you need it most Nearly sew free construction to eliminate chafing Material wicks sweat & dries really fast Anti odor technology prevents the growth of odor causing microbes