• The DEF-CHEK is designed to test the urea concentration of Diesel Exhaust Fluid
• Professional disc-type16 1/4” tester is accurate at all temperatures
• Easy to read discs are magnified by convex design of the clear SAN plastic barrel
• One-piece bulb and neoprene dip tube
• Shipping Weight 0.35 lb.
(California Prop 65)