TxRx 15CH Knee Coil 1.5T QED part number:Q7000016 Siemens Model # 10185453
Unintended ferrous material may be present within the pushbutton assembly of Siemens Knee and Siemens Extremity Coils.
Worldwide distribution - US in the states: NC OUS: Germany
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-0032-2020