Calibration Gas Mixture In 0.5 Ltr W/Caluminium Canister Along With Finecontrol Needle Valve Containing:Methane: 1000 Ppm, Ethane: 1000 Ppm,Ethylene: 1000 Ppm, Hydrogen: 1000 Ppm,Acetylene: 1000 Ppm, Carbon Dioxide: 5000Ppm, Carbon Monoxide: 5000 Pp M,Nitrogen: Balance. Specification: Fillingpressure: 20Kg/Cm2, Preparationtolerance: +/- 20% , Certificate Accuracy:+/- 2%, Stability: 12 Months. [ Warranty Period: 12 Months After The Date Of Delivery ] ]