Evans' new drumheads are called Evans 56. The Calftone heads are Evans' version of a synthetic calf skin. The vintage type drumhead has a warm, and fuzzy but focused tone. The looks are truly vintage and give the drums that classic but modern look. The '56' refers to the year 1956 that Evans was founded. Evans 56 are produced for all tom sizes. The bass drum 16" to 26". Bass drumheads are available as Calftone (single ply), EQ4 (with control ring) and an Emad version. Sizes range from 16" to 26".