Manufactured to the specifications of the American Society for Testing and Materials (ASTM). Select the hydrometer that you need by matching the ASTM number shown in the table * Calibrated for use at 15°C/60°F * Not recommended for use with hydrofluoric acid SPECIFICATIONS: * ASTM No.: 120H * Color: Clear * Length: 13 in (33 cm) * Measuring Type(s): Specific Gravity * Quantity: 1 Each * Specific Gravity Range: 1.450 to 1.500 * Subdivisions: 0.0005 * Warranty: 1 Year