This pH Buffer Calibration Kit contains a 3-pack of Chemixsol brand solutions in 250 mL (8 fl oz) bottles. The kit includes solutions with pH values of 4.01, 6.86, and 9.18 to meet various calibration needs. The bottles are labeled with the corresponding pH value for easy identification. This kit is ideal for use in laboratory, medical, dental, healthcare, and industrial settings. pH Buffer Calibration Kit 3-Pack: 250 mL (8 fl oz) Each of pH 4.00, pH 6.86, and pH 9.18 — Reference Standards for All pH Meters