manufacture and supply of 1 in 8.5 diamond crossing with single slips [ curved switch ] bg for 60 kg. rails [ uic ] on psc sleepers layout complete with cms acute x-ings to rdso drg. no. t- 4967, cms obtuse x-ing to rdso drg. no. t-6495 and 7000 mm or switches [ curved ] to rdso drg. no. t-6493 with latest alterations if any, as on date of opening of tender and conforming to irs specifications t-10-2023 and t- 29-2022 with latest amendments is any, complete with all parts as listed in the sub assembly drawings but excluding, fish plates, fish bolts, elastic rall clips, grsps and insulating liners / metal liners.