3"diameter by 10" long, with 1 breather (holds 1 quart). IMCO's polished aluminum puke tank may be mounted on the engine or behind the engine for use as a remote breather. They eliminate the problem of oil blowing out of the breathers onto the valve covers. Our valve cover breathers, 04-1270 come machined for -16 fittings to run hoses to the 1" pipe connections on the tanks. Tank brackets sold separately.