Teleflex MEDICAL HUDSON RCI One Way Valve w. Capped Monitoring Port, REF 1644, QTY 50 Product Usage: for use in respiratory and anesthesia circuits to connect two or more components of a breathing system.
These one-way valves may disconnect at the joint between the two components that make up the device, which would cause an interruption of ventilation to the patient.
US Nationwide in the states of AU, CA, NZ
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-1403-2018