The sensor adapter is made from 6061 aluminum materials and it comes it three models that can fit on different types of engine. It can help to install engine oil temp. meter or oil pressure meter.BW-GSB-01 can be installed on top of the OEM oil pressure switch. Two other models (OCGSB-01 and OCGSB-02) can be easily replaced with the OEM oil filter cover by simply remove and replace. The screw holes of the sensor is 1/8¡¨ PT. Two colors are available: blue and silver.