Specification: Condition:100% Brand New Material: Aluminum Color: As Pictures Shown Measurement range: 0-25% Vol, 0-40% Brix, 0-22Baume Length: approx.15.5cm/6.1in Middle Diamter: approx.2.9cm/1.1in Maximum Diamter: approx.3.9cm/1.5in Weight: Approx.230g/8.1oz Package list: 1 x Refractometer(with A Box) 1 x Pipette 1 x Screwdriver 1 x Cleaning Cloth 1 x User Manual Using Instruction: 1. Open the cover plate, use a clean cloth to wipe the prism. 2. Take a few drops of testing liquid to the detection prism, then close the cover plate slowly to avoid producing bubbles which will make the liquor spread all over the prism surface. 3. Put the cover directly point to the light source or bright place, observe the field of view through the eyepiece. 4. Turn the eyepiece to adjust the hand wheel to make the blue and white line clear. The scale value of the dividing line is the concentration of the liquor. Note: 1. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. This Grape Refractometer is Made of high quality aluminum, heavy duty and durable 3 in one hand held refractometers, with mesure range 0-25% Vol, 0-40% Brix and 0-22 Baume Accurate test results, easy to calibrate, You can measure the brix &baume& alcohol content accurately in seconds Soft, non-slip rubber handle, ensure a comfortable grip This Alcohol Refractometer is Suitable for restautant, Vineyard, Chateau wine, family dinner etc