supply of densified thermal bonded polyester block cushion (dtbpb) for lgs,gs coaches four seater back rest (long back rest) of size 25 x 562 x 1912 mm , densified thermal bonded polyester block cushion (dtbpb) for lgs,gs coaches four seater back rest (long back rest) of size 25 x 562 x 1912 mm to item no: 3 of icf drawing no: icf/sk 3-6-1-098. material specification to rdso spec. no.ck- 607, rev.2 of dec.2015 as per drg.no. item no: 3 of icf drawing no: icf/sk 3-6-1-098 as per specn. rdso spec. no.ck- 607, r ev.2 of dec.2015 [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]