1" x 2" / 0

01 calibration solution designed for accurate calibration of pH meters

In a long-term emergency

"I run this unit 24/7 and have not had any problems

physically blocked at 0

GroLine Storage Solution Sachets, 20 mL (2 pcs.) HM Digital COM-300L 1" x 2" / 0HI70300G is a high quality storage solution designed with hydroponics, aquaponics, and greenhouses in mind. Single use sachets are highly portable, with a small footprint and a lightweight design. They are the perfect accessory for your on the go testing, fitting easily into your pocket or carrying case. Specially formulated for storing GroLine electrodes. Single use sachets for convenience. Perfect for use with GroLine testers and portable meters!