Poh Kit For 355 Mm Dia Brake Cylinder To Rdso Drg. No. Wd-92051-S-06, Alt. 5, Consisting Of Following Items [1] Piston Packing To Rdso Drg. No. Wd-92051-S-10 Alt. Nil, Qty/Kit-1. [2] Wear Ring To Rdso Drg. No. Wd-92051-S-09, Alt. 2, Item No. 3, Qty/Kit-1. Conforming To Rdso Specification No. No.02 Abr-02 With Amendment No. 4 Of Sep-2016, Appendix- B .