tender for manufacture and supply of combination glass filled nylon-66 insulating liner for use with ercmk-iii flat toe on concrete sleeper for 60kg/52kg rail conforming to drawing no. rdso/t-3707 & rdso/t-3708as per specification no. irs-t-44-1995. (the alteration in drawing and specifications issued by rdso up to onemonth prior to tender opening date shall be applicable to this tender).