• Ideal for Precise pH Meter Calibration • Comes in a Convenient One - Gallon Size • Keep Both 4.00 and 7.00 Solutions for Accurate Results. This premium pH calibration solution 7.00 is a must - have for accurate pH meter calibration. Grab yours now!

This pH calibration solution 7.00 is great for anyone who needs to calibrate their pH meters, like scientists, hobbyists, and aquarists. You can use it in labs, at home, or in aquariums. It comes in a one - gallon container, providing you with plenty of solution for multiple calibrations.