supply of 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 ppm,nitrogen: balance. specification: fillingpressure: 20kg/cm2, preparationtolerance: +/- 20%, certificate accuracy:+/- 2%, stability: 12 months.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 ppm,nitrogen: balance. specification: fillingpressure: 20kg/cm2, preparationtolerance: +/- 20%, certificate accuracy:+/- 2%, stability: 12 months.,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 ] ]