supply of over hauling kit for duplex check valve of m/s. knorr-bremse india pvt. ltd. make used in air spring suspension system of emu coaches consisting of 4 items to drg./ spec.no as : 1) sealing ring - a38x44 din 7603 = 02 nos/sets . 2) o ring - 4a75374 = 02 nos/sets. 3) toothed washer - 4a63625 = 02 nos/sets. 4) valve head = a48128 = 02 nos/sets confirming to rdsos spec.no. str-k407 (rev-02). as per drg.no. as per description specn: spec.no. str-k407 (rev-02)over hauling kit for duplex check valve of m/s. knorr-bremse india pvt. ltd. make used in air spring suspension system of emu coaches consisting of 4 items to drg./ spec.no as : 1) sealing ring - a38x44 din 7603 = 02 nos/sets . 2) o ring - 4a75374 = 02 nos/sets. 3) toothed washer - 4a63625 = 02 nos/sets. 4) valve head = a48128 = 02 nos/sets confirming to rdsos spec.no. str-k407 (rev-02). as per drg.no. as per description specn: spec.no. str-k407 (rev-02),over hauling kit for duplex check valve of m/s. knorr-bremse india pvt. lt d. make used in air spring suspension system of emu coaches consisting of 4 items t o drg./ spec.no as : 1) sealing ring - a38x44 din 7603 = 02 nos/sets . 2) o ring - 4a75374 = 02 nos/sets. 3) toothed washer - 4a63625 = 02 nos/sets. 4) valve head = a48128 = 02 nos/sets confirming to rdsos spec.no. str-k407 (rev-02). as per drg.no. as per description specn: spec.n o. str-k407 (rev-02) [ warranty period: 30 months after the date of delivery ]