Antifreeze Tester — Coolant Refractometer

Check your coolant's freeze and boil-over protection level in seconds with this optical refractometer. Just place 2 drops of coolant on the prism, look through the eyepiece, and read the protection level for both ethylene glycol and propylene glycol antifreeze.

• Measures freeze and boil-over protection
• Works with EG and PG antifreeze
• 2-drop sample — result in 5 seconds
• No batteries required
• Includes dropper and carrying case