HM Digital PH-P4 pH 4.0 Buffer Solution - 20-Pack (20ml each) mineral water stick Protective Silicone Sleeve — Blue

Protective Silicone Sleeve — Blue sleeve provides comfortable grip and protects glass from impacts

For optimal performance and maximum contaminant reduction

Comfortable Grip — Silicone band provides soft

reliable water testing equipment

and results in under 2 seconds with just 2–3 drops of sample

HM Digital PH-P4 pH 4.0 Buffer Solution - 20-Pack (20ml each) mineral water stick Protective Silicone Sleeve — BlueHM Digital PH P4 pH 4. 0 Buffer Solution 20 Pack Ensure accurate pH measurements with the HM Digital PH P4 pH 4. 0 Buffer Solution 20 Pack. This bulk pack of acidic calibration standards is essential for labs, commercial operations, and frequent users who need reliable pH meter calibration at the acidic endpoint. Key Features 20 Pack Value: Twenty 20ml packets for multiple calibrations and long term use pH 4. 0 Acidic Standard: Precise acidic point