BATTERY/COOLANT/DEF REFRACTOMETER MST401 | eBaydiy Tools

Eliminates the need for two separate tools; check coolant and DEF with the same tool; all vehicles that need DEF checked also need coolant checked
Easily displays condition of ethylene glycol and propylene glycol
Scale to show charge state of battery fluid
Quickly confirm proper concentration of DEF (urea)
Easily calibrate with distilled water
Tool is hand held, works with ambient light and requires no power
Fitted in plastic case