North Safety® offers a variety of respirator air purifying cartridges that will protect workers in most any working environment. Use the specification/pricing chart below to select the correct cartridge dependent upon the hazards the worker(s) will be exposed to. Fits all North Safety series half and full-face piece respirators. (Cat. No's: S1680, S1681 & S1700) Cartridges available with or without P100 Particulate filters. Sold as 1 pair/pack.