EMAIL,TEXT or CALL at NINE SEVEN EIGHT SIX 400100. This is new/ never used. It is For installing a temp. gauge sensor directly in the upper or lower radiator hose. I’ve read that the best place to ad a sensor for the electric radiator cooling fans is on the bottom/outlet radiator hose. Radiator Hose size to fit is 1 1/2″ (one and one half inches) Inside Diameter and the sensor thread size is 1/8″ NPT. Comes with hose clamps. Thanks!