Must measure, aerometer, for measuring the quantity of sugar in grape juice, with thermometer.
Packed in plastic sleeve.
In 3 varieties:
Art: 1000800583 with Oechsle scale 0-30 (picture A)
Art: 135970988 with Oechsle scale 0-40 (picture A)
Art: 1000800544 with Babo scale 0-40 (picture B)