Our reusable EcoSmart Cylinders hold more calibration gases and are interchangeable with the current 34-liter and 58-liter aluminum cylinders on the market. Call us at 800-356-9100 for more information on how to return and reuse your cylinders. 100 PPM Carbon Monoxide; 25% LEL Pentane, 25 PPM Hydrogen Sulfide, 19% Oxygen, Balance Nitrogen; 66L Aluminum Cylinder
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