supply of thermoplastic polyester elastomer , thermoplastic polyester elastomer (hytrel) lower washer for primary suspensi on of axle box guide arrangement to rdso drg. no. cg-k-4059, alt.4 and to specn.c-k 409 (rev .3) of apr. 2023.uvam item ref. : 2300193--high capacity thermoplastic polyster elastomer upper & lower washers assembly used in the primary suspension for b.g main line coaches , sub item : 2300193002--sub item:high capacity thermoplastic polyster elastomer lower washers [ warranty period: 30 months after t he date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]