OTC/Bosch 4619 BATTERY FLUID TESTER

PROFESSIONAL BATTERY HYDROMETER - Displays a battery's specific gravity on an easy-to-read float; scale ranges from 1.100 to 1.300. Thermometer indicates what must be added or subtracted from the float reading to arrive at an accurate specific gravity reading for each battery cell. Flexible tip offers easy access to the battery cells while the battery is still in the vehicle.