Set of Suspension Springs for WAP4 Locos comprising of-- ( 1 ) Spring Primary to RDSO ' s Drg. No.- SK. DL- 3472 ( Alt.- 7 ) = 24 Nos. ( 2 ) Spring Secondary to RDSO ' s Drg. No. SK. DL- 3473 ( Alt.- 9 ) = 16 Nos. and RDSO ' s Spect. No.- MP. O. 4900. 12 ( Rev.- 05 ) of January 2020. ( All Springs to be procured as per Group- B i.e. Yellow marked of above mentioned RDSO ' s Drawing ).