GASCO 34L-M2N-10,000 Nitrous Oxide Calibration Gas N2O 10,000 PPM Balance Nitrogen contained in a 34 Liter Disposable Aluminum Cylinder, For Use with Any and All Gas Detectors, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA
10,000 ppm is equal to 1% by Volume