Double Wire Signalling Rope Steel Galvanised 6X19 With Fibre Core, The Tensile Breaking Strength 140-160 Kgs Per Sq.Mm And Nominal Diameter Of The Each Wire Shall Be 6Mm. Rdso Spec. N O.:Irs:S-11-62 Or Latest Amendment Up To Date Of Tender Opening. [ Warranty Period: 30 Months Afte R The Date Of Delivery ] ]