3M™ 4000 Series 4279+ Reusable Half Mask, FFABEK1P3RD Filters 3M™ The 3M™ 4000 Series 4279+ reusable half mask with FFABEK1P3RD filters provides reliable protection against gases, organic and inorganic vapors, ammonia, organic derivatives, and particles, making it suitable for industrial settings such as maintenance, production, chemical handling, and workshop operations; incorporating keywords like half mask, respiratory protection, FFABEK1P3RD filters, and industrial safety. Learn more