Sealey VS4121 Propylene Glycol Antifreeze Tester Twin-Rotor Tests propylene glycol antifreeze mixtures. Features a temperature compensation rotor that automatically adjusts the reading regardless of the coolant temperature. Freeze protection level is indicated on the scale in degrees Celsius. Tests propylene glycol antifreeze mixtures Features a temperature compensation rotor that automatically adjusts the reading regardless of the coolant temperature Freeze protection level is indicated on the scale in degrees Celsius Model No VS4121
