BioSystems 54-9049E Calibration Gas Cylinder. New.

Biosystems 54-9049E Calibration Gas, Hydrogen Sulfide 25ppm, Carbon Monoxide 50ppm, Propane Equivalent 50% LEL (Methane 1.62%), Oxygen 18%, Nitrogen Balance, 34 Liter Portagreen Aluminum Cylinder. Regulator part number: 12-023/12-025. Bacou-Dalloc Company. New. Free US Shipping. Hazmat Fee: $10.00. No Hazmat fee if you buy the two.