Wilson Championship Extra Duty Tennis Balls Carton, (24 Cans) Drive Sonic Boom Strikes: Li-Ning’s Tectonic

Sonic Boom Strikes: Li-Ning’s Tectonic 1 utilizes the air pressure formation process to elaborate sense of contact hits

This explains why it is extremely popular at the collegiate level

Sonic Core made with Infinergy

Rubber and Canes infused for flexibility

Wilson Championship Extra Duty Tennis Balls Carton, (24 Cans) Drive Sonic Boom Strikes: Li-Ning’s TectonicWilson Championship Extra Duty Tennis Balls Carton, 24 Cans (72 Balls) Dura Weave felt lends long lasting durability Extra Duty: Ideal performance on hard, abrasive courts Regular Duty: Ideal performance on soft, clay indoor surfaces High Altitude: Ideal performance on surfaces above 3,000 ft. Balls are numbered to differentiate from balls used by other players on neighboring courts 3 balls per can In Box Contents: 24 Cans 72 Balls