Do these have a NIOSH TC approval number?
These are KN-95, not N-95. They won’t have a NIOSH approval number.
Know this is an older sale but still it was good of you to ask. They are not NIOSH rated. They may be tested to Chinese governmental standards for KN95. Unforntately there are fake certifications as well.
Practical use: We have some KN95 that I consider better than double cloth masks.
We reserve N-95 for higher exposure staff caring for Patients.