pH EC Temp 3 in 1 meter
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Cup Grain MOIsture meter
BLuetooth pH EC TDs Temp Meter
Gaby BT TDS-EC-PH-CHLORINE-ORP-TEMP , combo Swimming pool Tester
Gaby Bluetooth pH meter
Gaby BLuetooth option , Dissolved Oxygen Meter
Gaby Bluetooth DO meter for water
100X Pocket microscope with scale
30X 60X 90X Portable Magnifier with LED UV Light 4
Gaby Hand Lens 10x and 5x