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THIS IS FOR A REPLACEMENT ELECTRODE not an entire unit
Optimize nutrient strength during growth, flowering, and fruiting Reliable waterproof, dustproof housing and replaceable electrode provide long life and value.
OK-35624-09 for pHTestr 1
OK-35624-29 for pHTestr 2
OK-35653-01 pH 4.0?calibration solution
Item Number: 131978
Manufacturer's Part Number: WD-35624-09