Tender For corrigendum : supply of black medium wall and flexible corrugatedpolyamideconduit, nw 70 mm as per rdso s pecification no. rdso/pe/spec/ac/0138-2009 (rev. 1) or latest suitable for fitment in zs ivc coupler of lhb coaches. material to be procured from rdso approved source only. [ warranty period: 30 mont hs after the date of delivery ]