GASCO Calibration Gas 58es-PH3-5, Phosphine Balance Nitrogen in a 58 Liter ecosmart Factory Refillable ecosmart Aluminum Alloy Cylinder
5 PPM Phosphine Balance Nitrogen, 58 Liter Aluminum Alloy Cylinder, For Use with Any and all Gas Detectors, Cylinder Connection C10 (5/8" - 18 UNF), Accuracy +/- 5 Percent, Calibration Certificate NIST, Made in the USA