🔧 Elevate Your Calibration Game! With a 24-month shelf life, you can stock up without worry! Enjoy free calibration support with every purchase—your success is our priority! Ensure your MSA gas detectors are always on point with our expertly formulated blend. Patented cylinder coating and stabilization process for reliable performance. Designed for MSA Altair and Sirius models, making it the go-to choice for professionals. 24-month shelf life 60ppm CO 20ppm H2S The 4-Gas Calibration Blend is a meticulously crafted gas mixture designed for MSA gas detectors, featuring a precise concentration of 20ppm Hydrogen Sulfide, 60ppm Carbon Monoxide, 58% LEL Pentane Simulant, and 15.0% Oxygen. With a patented cylinder coating for enhanced stability and a generous 24-month shelf life, this blend ensures reliable performance and peace of mind. Plus, enjoy complimentary calibration support with every purchase, making it the ideal choice for professionals in the field.