Measure the percentage of sodium chloride in solution with these hydrometers. Model 6611-1 measures the % saturation of sodium chloride in solution; Model 6611-2 measures the % by weight of sodium chloride in solution * Calibrated for use at 15°C/60°F SPECIFICATIONS: * Color: Clear * Length: 12 in (30.5 cm) * Material: Glass * Measuring Type(s): Saturation Percentage * Quantity: 1 Each * Range: 0 to 100 % Saturation * Subdivisions: 0.01 * Type: Sodium Chloride (NaCl) * Warranty: 1 Year