| 4 oz. Calibration Solution Kit. Contains One (1) 4 oz. bottle pH 4 Calibration Solution. One (1) 4 oz. bottle pH 7 Calibration Solution. One (1) 4 oz. bottle 1382PPM Calibration Solution. For use with the 24-7 Nutrient Monitor. This item is sold individually. The case size is listed for your convenience for instances where you wish to order in case quantities. — Ships via UPS from Portland, Oregon USA
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