Bush for Brake Gear of ICF Coaches, Size: Dia. 70 ( + 0. 35/ + 0. 15 ) mm x Dia. 57 ( + 0. 2/- 0. 1 ) mm x 25. 5 ( + 0. 0/- 0. 5 ) mm. Drawing No.: RDSO ' s Drg. No. SKETCH- 81039, Alt. 15, Item No. 7. Material and Specification: ( i ) SLPR to RDSO ' s Spec. C- K605 ( Rev. 3/ April 2023 ) OR ( ii ) HPPA to RDSO ' s Spec. RDSO/ 2009/ CG- 17 ( Rev. 3/ April 2023 ).