10" Hydrometer with specific gravity, potential alcohol, and balling scales. The packing tube it's shipped in can be used as a test jar. Readings idealized (that's fancy for "kind of calibrated") at 60°F. Environmentally conscious lead-free steel shot in hydrometer, all food grade & edible riser fluid (not that you'd want to eat it). As part of our sustainability initiative, we do not carry lead hydrometers - and we hope that you'll choose this Green Line product too! Scales: Balling: 0-38% Potential ABV: 0-22% Specific Gravity: 0.990 - 1.170