GroLine pH 4.01 Buffer Sachets, 20 mL (25 pcs.) pH 7 buffer Temp Probe: MA831R (included)

Temp Probe: MA831R (included)

Factory calibration ensures accuracy out of the box

lab-grade pH 4

1 Non-Slip Rubber Base Ring — keeps your unit stable on any surface

Travel Berkey Water Filter System (BT2X2-BB)

GroLine pH 4.01 Buffer Sachets, 20 mL (25 pcs.) pH 7 buffer Temp Probe: MA831R (included)HI70004G is a high quality pH 4. 01 calibration buffer 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. Supplied with Certificate of Analysis Single use sachets for convenience. Perfect for use with GroLine testers and portable meters!