AIR BRAKE HOSE COUPLING FOR FEED PIPE FOR ICF Coaches TO RDSO DRG. NO. WD- 81027- S- 01, ALT- 14. MATERIAL AND SPECIFICATION: RDSO SPEC. NO. 02- ABR- 02 WITH AMENDMENT- 4 OF SEPT. 2016, APPENDIX F. THIS ITEM IS RSERVED FOR PROCUREMENT FROM RDSO APPROVED SOURCES ONLY.