goods manufacture and supply of 6 mm thick grsp for channel sleeper to rdso drg no t 5163 or latest alteration if any with reference date as tender closing date conforming to indian railway standard specification for rail pads for placing beneath rails s no t55 2023 or latest with reference date as tender closing date warranty period 3 0 months after the date of delivery quantity tolerance 5 age item category normal total po value variation permitted max 8 lacs