Check the listing for details. Onset MX2500-MAINT-KIT Maintenance Kit, Calibration Kit. Condition: New. Listed at 86.39 USD. Subscribe to Our NewsletterOnset MX2500-MAINT-KIT Maintenance Kit with Calibration Kit and Electrode Storage Solution for Model MX2501 Brand:OnsetModel No:MX2500-MAINT-KITOur Model No:MX2500MAINTKIT Product OverviewFeaturesMX2500-CAL-KITIncludes pH 4.01, pH 7.00, pH 10.00 buffer solutions (475 mL bottles) for calibrating pH loggersCalibration beaker calibrates pH loggers and stores calibration solutionsMX2500-STORE-SOLNProperly stores and conditions pH electrode used with pH loggersMaintains hydrated gel layer that is integral to accurate pH readingsFor use with Model MX2501Included Components1 - 475 mL Bottle pH 4.01 Buffer Solution (MX2500-CAL-4)1 - 475 mL Bottle pH 7.00 Buffer Solution (MX2500-CAL-7)1 - 475 mL Bottle pH 10.00 Buffer Solution (MX2500-CAL-10)1 - 4 oz. Calibration Beaker (MX2500-CAL-BKR)1 - Electrode Storage Solution (MX2500-STORE-SOLN)Terms & ConditionsPlease note estimated delivery time above. Contact us for details or if you have a delivery requirement. We ask for your patience while striving to ensure your shipment arrives quickly and accurately.Domestic ShippingFREE Standard Shipping on items OVER $75 and less than 30lbs to continental U.S. Add $36 for AK, HI, or PR. Please contact us for shipping rates to any overseas US territories including: Northern Mariana Islands, Guam, Puerto Rico, U.S. Virgin Islands and American Samoa.PO Boxes/APOs require USPS shipping and may therefore experience longer lead times6.25% Sales Tax for shipping to MAInternational ShippingDue to international voltage requirements, please ask us prior to purchasing to confirm your product will operate correctly in your country.Please contact us for shipping rates to any overseas U.S. territories.International customers are responsible for all shipping charges, including any duties or taxes.