A great "false-bottom". Includes stainless steel rolled mesh screen which attaches to a 3/8 copper tube. Copper tube fits into a hole in a bucket or in your boiling vessel and attaches to a brass spigot. Allows the brewer to mash and sparge in the same vessel- or use only as a sparging system. Also works great in the boil kettle to filter out leaf hops and trub. This one is specially designed to fit into 15 gallon converted brewery kegs. Highly recommended.