Bluelab PH 4.0 Calibration Solution size:500 ml Easy measurement: just place the

Easy measurement: just place the probe in the sample

strap your rope hangers to your lights and hang 'em

Enclosures comply with N

Full growth cycle support – Use from seedling through flowering and harvest

Bluelab PH 4.0 Calibration Solution size:500 ml Easy measurement: just place theHigh quality calibration solutions Effective, affordable pH calibration Bluelab pH 4. 0 Calibration Solution 250 500 ml is essential for use with all Bluelab pH products. All Bluelab solutions are manufactured specifically for Bluelab products and are referenced to high laboratory standards to ensure your Bluelab products last longer and maintain accuracy. Product Features Benefits Contains 500 ml 16. 9 fl oz Boost your pH products longevity with