Tecnifibre X-One Biphase 18 is Tecnifibre's flagship playability tennis string

This new edition has been updated to a solid yellow with an orange dot printed on the ball

Sanctioned for both ITF and USTA tournament play

When properly folded

Solinco Tour Bite is a high-performance and versatile polyester string designed to generate extreme power and intense spin and bite

Gamma Tennis Court Marker Lines COLLECTION-Type-String Savers Tecnifibre X-One Biphase 18 isThese highly visible, treaded, non skid lines from Gamma can be used to create a 36' or 60' court for 10 & under tennis. 8 Straights. (4 Blue, 4 Yellow) 12" x 3" each 4 Corners. (2 Blue, 2 Yellow) 10" x 10" x 3" each Nonskid surface on bottom keeps your lines and corners in place. Screen printed Gamma logo on each.