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ST. PETERS HARDWARE & RENTAL
AUTO, HYDROMETERS
$3.99
Miniature Antifreeze Tester, Hydrometer, Floating Ball Type, Checks To -40 Degrees Fahrenheit.
$7.49
Prestone, Professional Antifreeze Coolant Tester, Quick Test For Freeze & Boilover Protection, Allows Inspection For Rust & Sediment.