1 1/4" OD ---- 32mm. Inline Radiator Hose Temperature Switch Adapter. 1 1/4" OD 32mm. DESIGNED for a 1 1/4" I/D RADIATOR HOSE. 14mm THREADS. This water temperature switch adapter is designed to allows you install and place a 14Mmm x 1.5 water temperature switch directly in the path of the water to the radiator, ensuring the most accurate reading possible.
