supply of high viscous nylon (hvn) liner for the use with wider bottom concrete sleepers for 60 kg rails to rdso drg no. t-8751 (alt-4) with latest alteration.high viscous nylon (hvn) liner for the use with wider bottom concrete sleepers for 60 kg rails to rdso drg no. t-8751 (alt-4) with latest alteration.,high viscous nylon (hvn) liner for the use with wider bottom concrete sleepers for 60 k g rails to rdso drg no. t-8751 (alt-4) with latest alterations, irs specification : irs t 44 -2025 (third revision) with latest alterations. the term latest alterations wherever used will be mean the alterati on up to the five days before the actual date of opening of tender. [ warranty period: 30 months af ter the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]