Amazon.com: ABN Deluxe Antifreeze and Coolant Tester Hydrometer Tester – Automotive Antifreeze Tester for Ethylene Glycol Coolant : Automotive
Antifreeze Refractometer - 3-in-1 coolant Tester for Checking Freezing Point, Concentration of Ethylene Glycol or Propylene Glycol Based Automobile Antifreeze Coolant and Battery Acid Condition: Amazon.com: Industrial & Scientific