supply of manufacture and supply of various types of metal liners.manufacture and supply of various types of metal liners.,metal liner for use with erc mk-v 25t on wider psc sleeper conforming to rdso drg. no. t- 8616 & t-8617 alt-1 with latest alteration. (the alt. in drawing and specification issued by rdso up to one month prior to the tender opening date shall be applicable) [ warranty period: 30 months after the date of delivery] , manufacture and supply of metal liners to rdso drawing no. rdso/t-8748 (as amended up to date) for use with wider psc sleeper to drawing no. rdso/t-8746 suitable to rails 60 kg. (uic) / 60 e 1 and conforming to irs specification for metal liners for use with elastic rail clips sr. no. t-56-2020 (as amended upto date). [ warranty period: 30 months after the date of delivery]