2 Packs of Solinco Hyper-G 17 g 1.20 mm Tennis String Square shaped co-poly with good combination of spin and control Medium to Firm string. You can take big cuts at the ball without overhitting Noticable high spin Each pack contains 40 feet (12.2 m) of string. 17 gauge 1.20 mm. This listing is for 2 packs total.