These cartridges are easy to install and are compatible with many 3M™ Half and Full Facepiece Respirators including the 3M™ Half Facepiece Reusable Respirators 6000, 6500/6500QL, and 7500 Series, and the 3M™ Full When used with 3M™ Scott™ AV-632 Bayonet Adapter, this cartridge can be used with 3M™ Scott™ AV-3000 HT and AV-3000 SureSeal FacepiecesFacepiece Reusable Respirators 6000, FF-400, and 7800 Series, helping to reduce inventory needs