supply of densified thermal bonded polyester block etc.densified thermal bonded polyester block etc.,densified thermal bonded polyester blocks for transverse seat. size 180 0 x 610 x 50 mm, to drg. no. misc. sk. no. 3746, alt-2, item no. 1. material and specification to rdso specification no. str c-k607[rev.2] december 2015. this item is reserved for pr ocurement from rdso approved sources only. as per drg.no. drg. no. misc. sk. no. 3746, alt-2 specn: rdso specification no. str c-k607[rev.2] december 2015. [ warranty period: 30 mo nths after the date of delivery ] , densified thermal bonded polyester block cushion for upper berth & ba ck rest berth side of ii tier ac coachesto size:- 2030 x 660 x 50 mm specn material to rd so spec. no.c-k 607, rev.2 of dec 2015. specn: rdso spec. no.c-k 607, rev.2 of dec 2015. [ war ranty period: 30 months after the date of delivery ] , densified thermal bonded polyester block cushion for longitudinal seat of size 90 x 495 x 615 mm for ii tier accoaches to item no. 5 of icf drg no wgscwac4-6-1- 411, alt n/4 specn . material to rdso spec no ck-607 rev2. of dec 2015. as per drg.no. icf drg n o wgscwac4-6-1-411, alt n/4 specn: rdso spec no ck-607 rev2. of dec 2015. [ warranty period: 30 m onths after the date of delivery ]