supply of diamond crossing , manufacture and supply of 1 in-8.5 diamond crossing with double slips (curved switch) bc for 60kg rail (uic) on psc:sleepers layout complete with 02 nos cms acute crossing to rdsos drg no. t-4967 wi th latest alteration , 02 nos cms obtuse crossing to rdsos drg no. t-6495 with latest alteration and 7000mm or curved switches to rdso drg no. t-6494 with latest alteration complete with all parts listed in the sub as sembly drawing but excluding standard fish plate , fish bolts , ercs and insulating liners/ metal liners. the re quired rails will be purchased by the manufacturer.(note:terms latestwhichever used will means the alteratio n/amendments upto the actual date of closing of tender) as per rdso drawing of diamond crossing double sli p 1 in 8.5,60 kg attached in documents. quantity tolerance: not permissible. ]