The washer allows you to easily and quickly connect the oil pressure and temperature sensor. It has all the necessary mounting elements along with a gasket. The product is of the highest quality. The adapter has 4 holes for the sensor with a standard 1/8 NPT thread. The set includes 1 piece of adapter (to choose from): M18 M20 M22 3/4 UNF The washer allows you to easily and quickly connect the pressure and temperature sensor It has all the necessary mounting elements with a gasket. The product is of the highest quality. The adapter has 4 holes for the sensor with a standard 1/8 NPT thread. The set includes 1 piece of adapter (to choose from): M18 M20 M22 3/4 UNF