The DEF-CHEK is designed to test the urea concentration of diesel exhaust fluid.  Professional disc-type 16-1/4 inch tester is accurate at all temperatures. Design to make sure the urea content is maintained at 32.5 perce...

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The DEF-CHEK is designed to test the urea concentration of diesel exhaust fluid.  Professional disc-type 16-1/4 inch tester is accurate at all temperatures. Design to make sure the urea content is maintained at 32.5 percent.

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