Tender For supply of thermoplasticpolyurethane spring pad (happy pad ) for secondary springs of 3 phase locos as per ref.no.2 (6mm thick) of s. c.rly.drg. no.c/els/lgd/bogie/3/140 alt.2 or latest & rdso spec.no.mo. 0.40.99.01 rev.03 august 2017 or latest. [ warranty period: 30 months after the date of delivery ]