Tenders for Supply of Densified Thermal Bonded Polyester Blocks For Transverse Back Rest Of Size 82 X 645 X 1695 Mm. For Ac Coaches Material Specification Conforming To Rdso Spec. No. C-K607, Rev. 2, Amendment No. 1 Of August 2016. Drg No : Wgsc Wac - 6-1-002, Item - 3.Alt : H / 5.