supply of over hauling kit for duplex check valveover hauling kit for duplex check valve,over hauling kit for duplex check valve of m/s knorr bremse make used in air s pring suspension system of emu coaches, consisting of 4 (four) nos. items in set, conformi ng to rdsos spec. no.str-c-k-407 (rev-03), amendment-1 of sept 2018 or latest. to m/s. kbi drg./ spec. no. as item- (1) sealing ring, to m/s. kbi part no.-453890=02 nos/set, (2) o ring, to m/s. k bi part no. a27763/26=02 nos/set, (3) toothed washer, to m/s. kbi part no.-466031=02 nos/s et & (4) valve head, to m/s. kbi part no. a48128=02 nos/set. [ warranty period: 30 months afte r the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]