Hanna pH4 Calibration Solutions -- 16 oz Cal Mag Additives Recognized for its quality and

Recognized for its quality and widespread use

Heavy 16 Roots root growth enhancer for a stronger rhizosphere

375in pouch

The inside floor here is a true 48 in x 48 in

UL 8800 compliance

Hanna pH4 Calibration Solutions -- 16 oz Cal Mag Additives Recognized for its quality andHanna's buffer solutions are made from established formulas and are standardized with a pH meter calibrated to NBS NIST primary standard buffer solutions. Now the pH 4 buffers carry lot # and expiry date as well as pH C chart on every bottle. HI 7004L C and HI 8004L C are also supplied with an analysis certificate. Hanna pH 4 buffers contain potassium hydrogen phthalate. They are standardized using a pH meter calibrated by primary standard buffer