X4 Labs™ TriForce Tension Spring Set
X4 Labs™ TriForce Tension option allows you to perfectly adjust the tension of your device like never before. It includes 3 different scientifically calibrated tension springs that can apply gentle traction therapy for beginners or powerful traction for more advanced users.
This allows you to minimize or maximize the tension of your X4 Labs™ device simply by substituting your springs. Add this to your device for even more customization.