Mueller-Kueps Diagnostic & Testing Tools
![Mueller-Kueps Diagnostic & Testing Tools](https://ic.carid.com/brands/mueller-kueps-toolsid_0.jpg)
- Mueller-Kueps®DEF/Ad-Blue 4-in-1 Refractometer (727 090)Universal DEF/Ad-Blue 4-in-1 Refractometer by Mueller-Kueps®. One tool tests it ALL! Test for proper concentration levels of Diesel Exhaust Fluid (DEF), commonly referred to as AdBlue in Europe. This unit will also test radiator...Ad-Blue fluid scaleTest also radiator coolant, windshield washer fluid, and battery acid$143.10