Evans BD20EMADUV2 EMAD UV2 Bass Drumhead - 20inEMAD UV2 bass drumheads set a new standard for durability. Extensively tested with some of the heaviest hitters, EVANS patented UV coating, layered atop two plies of 7mil film, creates superior impact resistance and ensures tonal integrity throughout its lifespan. EMAD UV2 heads have a medium brightness, enhanced durability, and the freedom to adjust the heads attack, focus, and sustain with EMAD. This drumhead also features Level 360 Technology.