Refractometer, Optical, Range 0 Percent to 32 Percent, Automatic Temperature Compensation Yes, Accuracy +/- 0.2 Percent, Resolution 0.2 Percent, Features Adjustable Focus, Zero Adjustment Screw for Calibration, Length 7 1/2 in, Width 1 1/2 in, Includes Adjustment Screw Driver, Carrying Pouch, Manufacturers Warranty Length 1 yr. This item has been restricted from sale in the following state (s): []