tender for supply/refilling of high purity gases on rate contract basis for a period of one year , supply/refilling of high purity gases on rate contract basis for a period of one year(refilling of 10 lit & 47 lit water capacity cylinders) , argon - 99.9995% purity 47 ltr , argon - 99.9995% purity 10 ltr , helium- 99.9995% purity 47 ltr , helium- 99.9995% purity 10 ltr , nitrogen-99.9995% purity 47 ltr , nitrogen-99.9995% purity 10 ltr , hydrogen-99.9995% purity 47 ltr , hydrogen-99.9995% purity 10 ltr , zero air- 99.995% purity 47 ltr , zero air- 99.9995% purity 10 ltr , oxygen- 99.9995% purity 47 ltr , oxygen- 99.9995% purity 10 ltr