Prestone | Antifreeze/coolant tester

This is a professional do-it-yourself (DIY) tester that easily tests for anti-freeze/anti-boil protection. It provides a quick and easy method to safely collect a sample and measure coolant concentration. This is a low-cost way to check the condition of the antifreeze/coolant in your car/vehicle. - Works with all ethylene glycol coolants - Allows inspection for rust and sediment - Tap to dislodge for air bubbles, Pointer shows degree of protection In great condition!