supply of standard calibration gas mixture , standard calibration gas mixture in canister with nozzle, fine control & gas composition/gas q uality certificate for dga water capacity 0.5 ltr. approx pressure : 20 kg/cm2 in canister & stability 12 mon ths. canister containing ch4, c2h6, c2h4, c2h2, h2 gas 1000 ppm & co and co2 gas 5000 ppm each bala nce n2 gas. canister required with regulator. gas composition test certificate of approved firm to be provid ed along with material. make spantech, upg, phoenix of equivalent. detailed specification as per annexure attached. [ warranty period: 30 months after the date of delivery ] ]