supply of densified thermal bonded polyster block etcdensified thermal bonded polyster block etc, densified thermal bonded polyester blocks for transverse seat. size 1800 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 procurement 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. , densified thermal bonded polyster blocks for middle and upper berth. size 1780 x 610 x 38 mm to drg. no. misc. sk. no. 3746, alt-2, item no. 2. material and specification as per rdso str. no. c-k607 [ rev. 2 ] december 2015. this item is reserved for procurement from rdso approved sources only. as per drg.no. drg.no.misc.sk.no.3746, alt-2 specn: rdso str.no.c-k607 [ rev. 2 ] december 2015. => limited