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Tester kits provide quick and precise troubleshooting and circuit testing of cars, trucks, RVs and SUVs. Raptor Supplies offers a wide variety of automotive diagnostic kits such as antifreeze hydrometers, universal dye cartridges, compression gauges & testers, filters and digital timing light kits, from brands like Bosch, Extech, Gearwrench, OTC and Proto. Antifreeze hydrometers are designed to test ethylene glycol solutions for determining coolant level. They feature floating discs to indicate the freezing point of the solution and are integrated with temperature adjustment scales.
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