supply of pvc insulated armoured unscreened underground, railway signalling cable copper con ductor as per specification no. irs-s-63/2014 (rev. 4.0) or latest with amendment size 2 core x 2.5 sq .mm. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 2 %age , item category : special (signaling cables) , total po value variation permitted: not applicable ] ] - signalling cable size 2 core x 2.5 sq.mm