Biopharm pH 4.00 & pH 7.00 Calibration Solutions - 250 mL each

Two Biopharm calibration reference solutions. Includes pH 4.00 Exp.05.15.2027 and pH 7.00 Exp.06.13.2027. Each bottle is 250 mL (8.4 fl oz). Suitable and accurate for all brands of pH meters.