POH KIT FOR 355 MM DIA BRAKE CYLINDER TO RDSO DRG. NO. WD- 92051- S- 6, ALT. NO. 5 CONSISTING OF FOLLOWING 2 ITEMS. 1 ] WEAR RING TO DRG. NO. WD- 92051- S- 09 ALT- 2 ITEM 3 QTY- 1. 2 ] PISTON PACKING RING TO DRG. NO. WD- 92051- S- 10 ALT- NIL QTY- 5 MATERIAL AND SPECIFICATION CONFORMING TO RDSO SPECIFICATION NO. 02- ABR- 02 APPENDIX- B READ WITH ALL AMENDS. LATEST AMEND. 4 OF SEPT- 2016.