NOS4200MW Features: -UNSPC CODE: 46182005. -Respirator Type : Half Mask. -APR Masks, Cartridges & Filters. -RESPIRATOR REUSABLE PARTICULATE. Product Type: -Respirator. Generic Specifications: -CFR-1 WELDING MEDIUM . -Norths CFR-1 reusable particulate respirators give workers comfort and protection at a better value than ordinary dust masks. Exhalation valve removes air quickly for easier and cooler breathing. The inhalation valve allows the user to perform a positive pressure seal check. Adjustable harness with parking mechanism provides a secure fit, and a convenient place to put the respirator when not in use. The CFR-1 Welding respirator comes with a stainless steel mesh cover to protect the user from sparks and slag. NIOSH approved..