Gasco 34L-421 100 PPM Carbon Monoxide 50% LEL Methane 25 PPM Hydrogen Sulfide 18.0% Oxygen Calibration Gas Nitrogen, 34 Liter, 1 Each color_Natural octagon-shaped cardboard dispenser with 100

octagon-shaped cardboard dispenser with 100 PF-Cardstock tags housed inside

disposable aprons are produced with state-of-lamination technology and have a microporous film

It features a hook-and-loop closure

97% filtration efficiency against oil and non-oil based airborne particles

Made in the USA by Gasco

Gasco 34L-421 100 PPM Carbon Monoxide 50% LEL Methane 25 PPM Hydrogen Sulfide 18.0% Oxygen Calibration Gas Nitrogen, 34 Liter, 1 Each color_Natural octagon-shaped cardboard dispenser with 100Gasco 34L 421 100 PPM Carbon Monoxide 50% LEL Methane 25 PPM Hydrogen Sulfide 18. 0% Oxygen Calibration Gas Nitrogen, 34 Liter, 1 Each The Gasco 34L 421 100 PPM Carbon Monoxide 50% LEL Methane 25 PPM Hydrogen Sulfide 18. 0% Oxygen Calibration Gas Nitrogen, 34 Liter, is a precision calibration gas used to calibrate sensors in gas detection equipment for environmental emissions monitoring, industrial hygiene monitors, and trace impurity analyzers.