Photo 1 of Extech PH100 Waterproof ExStik II pH Meter Kit with Flat Surface Electrode and Temperature Display

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Photo 1 of Extech PH100 Waterproof ExStik II pH Meter Kit with Flat Surface Electrode and Temperature DisplayPhoto 2 of Extech PH100 Waterproof ExStik II pH Meter Kit with Flat Surface Electrode and Temperature Display