This is the ORIGINAL “T” style extender arm. 
If you see one on Amazon it’s an illegal knock off. We do not sell on any marketplace only through the Fitness Evolution 808 and approved medical resellers.
The only “Made in USA”, REACH 360 Extension Arm, US Patent D958,389, for most “T” style percussion massagers, such as Hypervolt by Hyperice or VIBRAFORCE Advanced or PRO devices by Fitness Evolution 808. 
Easily tend to out of reach areas such as your mid to upper back, independent of assistance. Reach your lower extremities without twisting or bending over. Extension arm length will range from 13.5” - 14”. Vibration at the rubberized grip extension handle portion will be greatly diminished due to the thick rubber coupling connector. 
To Learn More and Confirm Compatibility*: https://youtu.be/VzD58d2RF1Y
NOTE: 
This will fit perfectly straight lithium ion battery handles that measure 2" diameter with rubber grip. 
We gladly accept returns within 7 days of receipt with a 15% restocking, less credit card processing fees.
MUST WATCH for proper attachment: "Attach & Remove" VIDEO FIRST (https://youtu.be/6qf7VCIwfEw).