Details Protects the workers againt P2 Level particulates and nuisance level organic vapor relief below the Permissible Exposure Level (PEL). With activated carbon layer. For use with 3M™1200, and HF-50 Single-Cartridge Facepiece Reusable Respirator. Compatible with 3M™ Filter Holder 1700. Complies to KMOEL P2 standards. 3M™ Particulate Filter 1744C, with activated carbon layer, is used for use on the 3M Reusable Half Face Mask Respirator model 3200 or 1200.