Hanna HI783-11 Marine Magnesium Certified Standard KitThe HI783-11 Marine Magnesium Certified Standard Kit is used to validate the performance of the HI783 Marine Magnesium Checker HC. The kit includes one sealed cuvette with a zero-magnesium value and one cuvette that is tinted to a standard magnesium value at 25C. The Certificate of Analysis details the certified magnesium value, the product code, lot number, and expiration date.Pre-tinted standard valuesSupplied with Certificate of AnalysisReusable with a long shelf-life