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
String MD - With the ERT 300 Tenniscomputer, you'll know when it's time to restring your racquet. The display shows current stringbed stiffness (dynamic tension), indicating the power and aggressiveness of play
![ERT300 TENNIS STRING TENSION TESTER - KNOW THE TENSION OF YOUR TENNIS STRINGS EVERY TIME YOU PLAY - YouTube ERT300 TENNIS STRING TENSION TESTER - KNOW THE TENSION OF YOUR TENNIS STRINGS EVERY TIME YOU PLAY - YouTube](https://i.ytimg.com/vi/goQKj-9xbgI/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLDZTFOcYRY1V2mfzjFl1JEdbYOoFw)