Holding a maximum capacity of 103 litres, this steel calibration gas canister has a 5/8"-18 thread UNF connection, and measures 14 inches in height, and 3-1/4 inches in diameter. It holds a gas mixture of 100 ppm carbon monoxide, 25% LEL pentane, five percent carbon dioxide, and 18% oxygen, with nitrogen as the background gas. It has an accuracy of +/- two percent at 51-300 ppm, +/- five percent at 21-50 ppm, and +/- 10 percent at two - 20 ppm, with 1000 maximum PSI.