Nutri+ pH 4 Calibration Solution 4L Thrips Type Hose Reel Open or

Type Hose Reel Open or Enclosed Chassis Open Color Red For Use With Air Style Open Chassis Drive/Return Type Spring Return Outlet 3/8"

Perfect for usage in schools

Accelerated Hydrogen Peroxide® (AHP®) Indicator Strips

Dimensions: 4 feet by 6 feet

large) to comfortably fit many faces

Nutri+ pH 4 Calibration Solution 4L Thrips Type Hose Reel Open orNutri+ pH 4 Calibration Solution 4L These calibration solutions allow you to recalibrate a pH meter that is giving improper readings. In order to properly calibrate a pH meter, you must have a test solution with a known pH level. These solutions will have you calibrate your meter until it gives a reading of 4 or 7 that matches the bottle.