supply of k electrode, epoxy chloride electrode,na electrode for ise and pm kit for em 200.k electrode, epoxy chloride electrode,na electrode for ise and pm kit for em 200.,k electrode for ise (item code 113953) (item must be compatible with xl-640) [ warra nty period: 18 months after the date of delivery ] ] , pm kit for em 200, make: erba (transasia biomedicals) [ warranty period: 24 months aft er the date of delivery ] ] , epoxy chloride electrode for ise ( item code 113956)( item must be compatible wi th xl-640) [ warranty period: 18 months after the date of delivery ] ] , na electrode for ise (item code-113954) item must be compatible with xl-640 [ wa rranty period: 18 months after the date of delivery ] ]