Used with 3M™ Particulate Filter 5N11 or 3M™ Particulate Filter 5P71 and 3M™ Filter Retainer 501. The 3M™ Filter Adapter 603 enables the 5N11 and 5P71 N95 and P95 prefilters to be directly attached to a 3M™ Full or Half Facepiece 6000, 6500, 7000 or FF-400 Series or 3M™ Scott™ AV-3000 HT and AV-3000 SureSeal facepieces with 3M™ Scott™ AV-632 Bayonet Adapter. Do not use the filter adapter 603 with the 650XQL Series half facepiece. The filter adapter 603 may be used multiple times. It provides a cost-effective filtering solution when multiple filters are needed for 3M elastomeric facepiece