This will place the temperature sensor directly in the stream of the water towards the radiator without absorbing transient heat from the engine block for accurate readings of the water temperature. Four sizes are available for the perfect fit for just about any engine application and stays water-tight to prevent leaks with the provided hose clamps. Each adapter features an 1/8 NPT fitting.

Inches to millimeters conversion chart:

28 Millimeters = 1 1/32" (most Honda's)

30 Millimeters = 1 1/16"

32 Millimeters = 1 1/4" (Celica)

34 Millimeters = 1 3/8" (Supra, Chevy's & Cobalt SS)

38 Millimeters = 1.5" (Subaru, Hyundai & RX-7)