●AUTOUTLET Animal Clinical Refractometer--This 3-in-1 Animal Clinical Refractometer is designed for dogs and cats, used to measure animals health index of urine specific gravity and serum protein. ●Measures on 3 Scales--The left one is for testing urine specific gravity of dogs, the middle one is for cats, the right one is for testing serum or plasma protein level. ●Measurement Range--Total serum or plasma protein(SP): 2-14g/dl. Urine specific gravity of dogs: 1.000-1.060 RI; Urine specific gravity of cats: 1.000-1.060RI. ●Solid and Lightweight--The Clinical Refractometer is made of durable aluminum, which is non-staining, non-corrosive and rustless. Also, its compact in size with rubberized grip handle, very easy to carry. ●Easy to Use--This Animal Clinical Tester is easy to operate, only need 2 drops of sample, then you can get accurate value without the high cost of laboratory analysis.