Someone needs to get this out of the weeds,fix it up and put it to use. It's probably not for a hobbiest with a couple cars but a farming,construction operation or restoration shop especially old trucks where used tires and tubes are used these things are infallible. It's filled with water,a tube or even a mounted tubeless tire is put in the tank,the air ram pushes it under,and where the bubbles come from,that's where the leak is. This one will need the tank sealed,probably fiberglass. Don't know if the ram works or not. This thing is about 4 1/2' in diameter. $125 and will need to be picked up. Or I guess delivery is possible close by. Please PM me if interested.