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$Photo 1 of 3-in-1 Digital Salinity Refractometer with ATC/Refractive Index(RI), Accurate Measurement with Precision Light-Blocking Cover, Fast Touchscreen Test Spoon Meat/Aquarium/Saltwater, Salt Content:0-28%$ $Photo 2 of 3-in-1 Digital Salinity Refractometer with ATC/Refractive Index(RI), Accurate Measurement with Precision Light-Blocking Cover, Fast Touchscreen Test Spoon Meat/Aquarium/Saltwater, Salt Content:0-28%$ $Photo 3 of 3-in-1 Digital Salinity Refractometer with ATC/Refractive Index(RI), Accurate Measurement with Precision Light-Blocking Cover, Fast Touchscreen Test Spoon Meat/Aquarium/Saltwater, Salt Content:0-28%$