ERT 300 Tennis String Tester- First Thoughts - Love Tennis Blog
Santa Barbara School of Tennis - Hilton Santa Barbara Beachfront Resort - Learn how to compete, win, and enjoy the game of tennis! - Pro Shop and Services
String MD - I use an ERT 300 tennis computer to measure the dynamic tension on every string job. The ERT 300 measures the DYNAMIC TENSION DT (string bed stiffness) by electronic