The OTC DEF Refractometer Kit #5025 is a reliable tool for testing the percentage of diesel exhaust fluid (DEF) in passenger vehicles and heavy-duty/commercial vehicles. Made by the trusted brand OTC, this DEF % tester is a must-have for automotive professionals and enthusiasts looking to ensure optimal engine performance. With no warranty, this kit is designed for long-lasting durability and accuracy in detecting DEF urea to water percentages in vehicles. No longer needed. Very useful for DEF Issues troubleshooting.
