EZ Red DEF Hydrometers

EZ Red offers DEF Hydrometers that are ideal for quick, accurate, and easy-to-read level readings of diesel exhaust fluid, every time. The DEF tester uses a proprietary method to provide accurate results and compensates for temperature. Simply draw the DEF solution into the hydrometer, tapping away any air bubbles. If the arrow is in the 'good zone' the solution does not need to be replaced. If a longer reach is needed, users can attach the included extension hose by inserting the smaller tip into the attached hose. EZ Red DEF fluid testers are made of strong SAN plastic, rubber, neoprene, and polypropylene, which makes them resistant to dirt, grime, and grease. Show Less