This is a used Ted Klum Acoustimer alto mouthpiece in size 5. This model is no longer in production and was replaced by the Acoustimax series. In comparison to the Acoustimax, this piece has a darker, grainier tone. It is made out of a composite material and is in pristine condition. This piece was made and hand finished, under Ted Klum’s supervision, in the USA. Box, bag, and ligature included.