Acustrip CTS 2050 is designed to evaluate the condition of Antifreeze coolant, and the 480508 Series is designed to test for presence of hydrocarbons when contamination by diesel fuel or oil is suspected. They are both available in bottles of 50 tests. The test strips provide "dip n' read" results for a quick assessment of the fluids when needed or when the vehicle in is for its scheduled PM. The results of the tests of the PM record, help identify issues early.