supply of refilling of argon gas grade-iii, purity 99.991%, capacity of each cylinder is 07 cubic meter to is 5760/1998, amendment no.1 of 2008, rev.2 or latest. note : 1) refilling is to be done as and when required. howerver, refilling shall be done in a batch of five cylinder s (35 cum) only. 2) batch wise test certificate of gas shall be provided along with evry supp ly 3) empty cylinders to be collected from sse/cr-iv/pl and return duly filled with argon g as to stores / consignee within 5 working days ?. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]