This hydrometer measures the specific gravity and freezing point of calcium chloride in solution * Calibrated for use at 15°C/60°F * Freezing Point Range: +30 to -40°F SPECIFICATIONS: * Color: Clear * Length: 12 in (30.5 cm) * Material: Glass * Measuring Type(s): Specific Gravity, Freezing Point * Quantity: 1 Each * Specific Gravity Range: 1.000 to 1.280 * Subdivisions: 0.002 Specific Gravity, 5°F Freezing Point * Type: Calcium Chloride (CaCl2) * Warranty: 1 Year