Evans EMAD Clear Heads are made of a single ply of 10-mil film that creates a pretty balanced punch with moderate attack and focused low-end frequencies. This head is fairly versatile, able to fit right in across a wide range of styles from jazz to metal.The Externally Mounted Adjustable Damping system - or EMAD - affects how much attack and resonance the head produces. • MSKU TT16EMAD • UPC 019954918712