Calibration Gas Mixture In 0.5 Ltr W/C Aluminium Canister Along With Fine Control Needle Valve Containing: Methan:1000 Ppm, Ethan:1000 Ppm, Acetylene 1000 Ppm, Ethylene:1000 Ppm, Hydrogen:1000 Ppm, Carbon Dioxide:5000 Ppm, Carbon Monoxide:5000 Ppm, Nitrogen: Balance. Specification: Filling Pressure: 20 Kg/Cm2, Preparation Tolerance: / 20 Percent , Certificate Accuracy: / 2 Percent , Stabiliti: 12 Months.