Nutri+ pH 4 Calibration Solution 4L Thrips 5ml/9ml glass jar with 28mm/38mm

5ml/9ml glass jar with 28mm/38mm CR lids ribbed or smooth

Heavy duty green scouring pads are ideal for scrubbing stubborn burnt-on stains

You won't have to stop your production to replace parts because the design is free of rubber bands

Perfect for usage in schools

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"

Nutri+ pH 4 Calibration Solution 4L Thrips 5ml/9ml glass jar with 28mm/38mmNutri+ 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.