Safeguard yourself and employees from potential workplace hazards. • Cartridge. • 1 pair. • 1 (H) x 0.49 (W) x 1 (L). • Resistance: Ammonia chlorine chlorine dioxide formaldehyde hydrogen chloride hydrogen fluoride methylamine sulfur dioxide defender organic vapor hydrogen sulfide (escape). • Cartridges for air-purifying respirators defender multi-purpose cartridge. • Weight: 0.49 lbs. • Sold as 1 Pair.