Feature●25 PPM Hydrogen Sulfide, 100 PPM Carbon Monoxide, 0.35% (25% LEL) Pentane, 19% Oxygen, Balance Nitrogen - 58L●Replaces part numbers: ISC 1810-2187, MSA 10007049, Gasco 58L-411, Portagas 10327765●Regulator compatibility: 500 Series Preset Flow, Trigger Control Series, 6000 Series Multiflow, 8000 Series Demand Flow●Shelf Life: 24 Months●Manufactured under ISO:9002 quality standards by NorLab Specialty Gases with NIST traceability certificationDescription Multiple component portable calibration gas mix: 25 PPM Hydrogen Sulfide, 100 PPM Carbon Monoxide, 0.35% (25% LEL) Pentane, 19% Oxygen, Balance Nitrogen in 58 Liter Aluminum Cylinder. Use to calibrate any gas detector requiring the specified gas concentration and mixture. Manufactured under ISO:9002 quality standards by NorLab Specialty Gases with NIST traceability certification.