supply of kit overhauling piston valve to kbi/nyab part no. i88098/391 consisting of 15 items , kit overhauling piston valve to kbi/nyab part no. i88098/391 consisting of 15 items for wdp4/w dg4 locos. 1. round wire netting to part no. b27807 -1no 2. ring to part no.a49689-1no 3. toothed ring to par t no. a62331/2 -1no 4. o ring to part no. b39512 -3nos 5. o ring to part no. a27763/27 -2nos 6. o ring to part n o. a69700 -2nos 7. compression spring to part no. a82019 -1no 8. o ring to part no. or111000 -1no 9. compre ssion spring to part no. b40987 - 1no 10. knorr-k-ring to part no. 462465 -1no 11. knorr-k-ring to part no. 4625 74 -1no 12. retaining ring to part no. 465892/470884 -1no 13. retaining ring to part no. 465893. 14. knorr-k-ri ng to part no. 457353 -1no. 15. valve head to part no. b90077 - 1no. [ warranty period: 30 months after the date of delivery ] ]