These copper counter flow chillers are probably one of the fastest ways to chill wort. They are similarly efficient as the 30 plate chillers however they are easier to clean as they do not have all the small crevasses to trap hop material and other solids.
These units are 9" in diameter and about 7" high. The input and output are approximately 3/8" outside diameter. These can be used with gravity but are recommended to use with a pump.