Let me introduce our company as a leading manufacturing firm in CNG industry and converting vehicles from petrol to CNG with more than 60 workshops all over in Iran. We are in contract with 3 main famous vehicle company in Iran , SAIPA , IRAN KHODRO and IFCO so we should just work with OEM supplier. We need high quantity of springs in different kinds with the material of PW2 that i'm going to send you the drawing of one of them throught attachment. Please inform me if you can supply our needed springs which are high quantity. Your prompt reply will be highly appreciated.