supply of poh kit, description is as under, poh kit for automatic pressure modification device ( el-60 ) for bmbs fitted on freight stock consisting of 23 items to m / s knorr bremse india pvt. ltd. part numbers as under: 1 ) tube port plug with o ring: kbi part no 760837 - qty. 01 no, 2 ) o ring: kbi part no 738362 - qty. 01 no, 3 ) umbrella valve: kbi part no 772345 - qty. 01 no, 4 ) indicator: kbi part no 771071 - qty. 01 no, 5 ) o ring: kbi part no. 756728 -qty. 01 no, 6 ) spring: kbi part no 771112 - qty. 01 no, 7 ) spring: kbi part no 771630-qty. 01 no, 8 ) guide pin: kbi part no 771197- qty. 01 no, 9 ) o ring: kbi part no 789842-047- qty. 02 no, 10 ) piston: kbi part no 771113-qty. 01 no, 11 ) o ring: kbi part no 783649-047-qty. 01 no, 12 ) check valve: kbi part no 771329-047-qty. 01 no, 13 ) o ring kbi part no 789842-023- qty. 01 no, 14 ) spring: kbi part no 771629-qty. 01 no, 15 ) o ring: kbi part no 719475.- qty. 01 no, 16 ) diaphragm: kbi part no 755749-qty. 01 no, 17 ) dust book: kbi part no 772308--qty. 01 no, 18 ) elastic stop nut: kbi part no 733883-qty. 02 no, 19 ) adjusting screw: kbi part no 782169-qty. 01 no, 20 ) lock nut: kbi part no 755896-qty. 02 no, 21 ) dust cap: kbi part no 776207- qty. 01 no, 22 ) ring gasket: kbi part no 772401-qty. 01 no, 23 ) ring gasket no 781215- qty. 02 no. one kit consists of items at sr. no 1 to 23 as above, total 27 nos. per kit. other technical requirements conforming to rdso specification no.wd-23-bmbs-2008, rev-i of september-2015 read with amendment no.1 of sept.-2016. [ warranty period: 36 months after the date of delivery ]