This easy-to-read Stevenson-Reeves triple scale hydrometer is 23 cm long and has 3 scales for measurement Specific gravity - with a range of 0.98 to 1.12 at 20C, Sugar scale - with a range of 0 to 270 grams per litre and Potential alcohol scale for wines only of 5 to 17%. Coloured bands indicate where to start and finish wines and beers and there is an indication for sweet/medium/dry finished wines. The hydrometer comes packed in a strong clear plastic tube along with an instruction leaflet. For Professional reading Made in UK.