The Apera Instruments Ai1109 pH calibration buffer solution Kit includes three 16oz bottles of pH buffer solutions (pH 4.00, pH 7.00, and pH 10.01), one 4oz bottle of 3M KCl storage solution for pH/ORP electrodes, Plus one piece of apera’s unique cal box, which helps users to organize all the solutions in one place and create no more mess in the calibration process. the color-coded buffer solutions are standardized against NIST certified pH References within 0.01 pH at 25˚c (77˚f). it's ideal for the calibration of all kinds of pH meters. Since pH level is affected by temperature, a temperature/pH reference Chart is provided on the bottle Label for reference. The 3M KCl storage solution helps keep the sensitivity and accuracy of your pH probes. All the solutions are double-sealed, not subject to the dot shipping restrictions, and have a 1-year shelf life. Expiration date is printed on the bottle. Msds documents are downloadable. Note: store at room temperature and away from direct sunlight. Keep the bottle tightly closed when not in use. Keep out of REACH of children.

• High accuracy (±0.01 pH): standardized against NIST Certified pH references within 0.01 pH at 25˚c (77˚f). ideal for the calibration of all kinds of pH meters
• Color-coded, double-sealed, 1-Year shelf life. Expiration Date and temperature/pH reference chart provided for reference
• Apera's unique cal box included, No more mess for your meter's calibration
• The 3M KCL storage solution helps keep the sensitivity and accuracy of your pH probes
• Non-hazardous product (MSDS is downloadable)

High accuracy (±0.01 pH): standardized against NIST Certified pH references within 0.01 pH at 25˚c (77˚f). ideal for the calibration of all kinds of pH metersApera Instruments, LLC