https://www.uline.com/Product/Detail/S-9749/Dust-Masks-Respirators/3M-5N11-Replacement-Particulate-Filter-N95
3M 5N11 N95 Prefilter S-9749 - ULINE
For use with cartridges only. Adds particulate protection. Must be used in conjunction with Prefilter Retainer . When attaching to 3M Half-Face or 3M Full-Face...
3m 5n11n95prefilter9749uline