This is a BE 85.305.001 quick connect gauge for a pressure washer. It is designed to measure pressure up to 5,000 PSI. The gauge features a quick connect plug and coupler fittings. It is a glycerin-filled, stainless-steel case which dampens vibration for accurate readings. Check out the pictures and if you are interested in it, please give me a call or text and we can set up a time for you to come get it.