Professional Alcohol Hydrometer Meter Tester for Wine Vodka Whiskey Alcoholmeter Measuring Instrument Measurement Tools with Plastic Case The scale on the hydrometer reads from 0 to 100 degrees of alcohol 12 pcs Hydrometer alcohol meter 0 to 0-40 / 40-70 / 70-100 with 4 pcs 0-50 degree Thermometer The amount of alcohol alcohol concentration was measured only at standard temperature (20 Celsius) is the actual concentration of alcohol. However, in practice the temperature of alcohol are not standard temperature 20 Celsius, so you need to nonstandard temperature measured alcohol concentration conversion to standard temperature in degrees is obtained the actual concentration of alcohol. Conversion table is prepared for this purpose. Color: as shows Material: glass Instructions for use: 1. Alcohol meter must be cleaned and dry before use - (cleaned with soap or alcohol). 2. After clean the alcohol meter- hand can not take in engraved line portion - you should gently with your index finger and thumb hold the dry tube top. 3. Must be cleaned graduated cylinder to avoid affecting the readings. 4. If you find indexing position paper- glass cracks - grime attached and can not be removed- the alcohol count must immediately stop using . Note: This set is mainly used for white wine meter measurement The white wine temperature at 20 degrees- measurement results are most accurate Distilled wine can not be measured! ! Package Contents: 12 x Hydrometer alcohol meter 4 x Thermometer 4 x wooden Case 4 x english user manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.