Procurement of 660mm LENGTH AIR BRAKE HOSE COUPLING FOR [ 660mm LENGTH AIR BRAKE HOSE COUPLING FOR BRAKE PIPE DRG NO. RDSO SK- 73547, ITEMS 1 TO 7 ALT- 14 SPECIFICATION, APPENDIX- F OF SPEC. 02- ABR- 02, AMENDT. NO. 4 OF SEP. 2016. SPECIAL CONDITION: ENSURE THAT THE PLASTIC DUMMY CAP SHALL BE IN RED COLOR WITH THICKNESS 3. 5 TO 4 MM. ]