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3-in-1 Animal Clinical Refractometer, Measuring Animal’s Health Index of Urine Specific Gravity and Serum Protein, Ideal…

$21.99
Make sure this fits by entering your model number. Animal clinical refractometer for testing the health index of urine specific gravity and serum or plasma protein for animals. Triple scales: the left one is for testing urine specific gravity of large animals like dog, the middle one is for testing urine specific gravity of small animals like cat, the right one is for testing serum or plasma protein level for all animals.

Aichose Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium, Saltwater Pool, with ATC Function, Dual…

$19.99
Make sure this fits by entering your model number. It is designed for the measurement of seawater or low concentrated saltwater. Dual scale: 0-100‰ salinity and corresponding specific gravity 1.000-1.070