supply of set of items for dgaset of items for dga,set of items for dga as detailed: 1)calibration gas mixture for dga with needle valve for drawing the gas. each can contains 10 litres of gas at pressure 20 kg/cm2 in alum inium can have the following composition a)methane-1000ppm, b) ethane-1000ppm, c) ethylene - 1000ppm, d) acetylene-1000ppm, e) hydrogen - 1000ppm, f) carbondioxide-5000ppm, g) carbon monoxide-5000 ppm, remaining gas nitrogen gas with calibration certificate, qty/set:2 nos, 2 ) vaccum grease (pack of 50 gms),qty/set:10 nos. [ warranty period: 30 months after the date of d elivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]