supply of polyurethane spring pads for secondary springs of 3 phase locomotives to id 199mm; od 310mm and thickness of 6mm.polyurethane spring pads for secondary springs of 3 phase locomotives to id 199mm; od 310mm and thickness of 6mm.,polyurethane spring pads for secondary springs of 3 phase locomotives to id 199mm; od 310mm and thickness of 6 mm. material and testing: thermoplastic polyurethane spring pads (happypads) for locomotives as per rdso spec no mp.0.40.99. 01(rev 03) of aug 2017. note: hardness of the spring pads to be maintained between 90-95 shore a as per is 868. note: supply b y sources as per blw item id: 2201253 in ireps vendor directory. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]