Tolerances match those laid out by the Internal Revenue Service specifications * Commonly used in distilleries requiring certification * Calibrated for use at 15°C/60°F * INCLUDES: Hydrometer, NIST-traceable certificate with 3 data points, and a protective PVC case SPECIFICATIONS: * Color: Clear * IRS Size: B * Length: 9 in (23 cm) * Material: Glass * Measuring Type(s): Alcohol Proof * Proof Range: 80 to 120 * Quantity: 1 Each * Subdivisions: 0.5 * Tolerance: ±0.5% * Warranty: 1 Year