3M 7000001933 half facepiece reusable mask is compatible with 3M supplied air systems and welding shields. This medium-sized mask provides good protection against mold and silica hazards, with an assigned protection factor of 10. It features a drop-down feature and an exhalation valve for added convenience and comfort. The replaceable cartridge is not included, but spare parts are available. Made of thermoplastic elastomer (TPE), this mask ensures durability and a secure fit with its 4-point harness. Accessories such as clip-on welding shields or speaking diaphragms are not included.