Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 plant-support DERIVED FROM: Urea

DERIVED FROM: Urea

Weight: 90

ergonomically designed display

• 1000W 120/240 Volt Electronic Ballast

Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 plant-support DERIVED FROM: UreaHanna's Buffer solutions are made from established formulas and are standardized with a pH meter that is calibrated to NBS NIST primary standard buffer solutions. The 20 ml sachets are ideal for infrequent calibrations while for heavy duty applications, you can choose from the popular 230 ml, 1 liter, or 1 gallon containers. Now the pH 4 buffers carry lot #, expiry date as well as pH C chart on every bottle. HI 7004L C and HI 8004L C are also supplied