21Y14 PushValve Product Usage: The PushValves/ MagValves is intended exclusively for the prosthetic fitting of lower limb amputees. The valve is a threadless one-way valve. It is used to evacuate air from the prosthetic socket.
Some of the installed valve-inserts have a diameter smaller than the specification.
US Nationwide Distribution
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-0826-2019