Professional Refract meter 
Requires just one drop to measure refractive index of solution. Tests anti-freeze (EG/PG) protection and battery electrolyte (state of charge). Features Fahrenheit and Centigrade scales for anti-freeze plus a scale showing degree of battery charge.
WARNING May Cause Cancer and Reproductive Harm www.P65Warnings.ca.gov
Has calibration adjustment and adjustable focus. Includes small screwdriver, eye dropper and padded case.
Availability: In stock.