Evans Onyx resonant series features a single ply of 10mil film and an offset 5" microphone port. The EQ3-like design offers a warm and punchy sound with a controlled, short decay that's ideal for both live and studio applications. The Onyx film contains a frost matte coating offering a short sustain with a dark sound. For over 60 years, Evans has been an innovator in drumhead manufacturing and design. As the creator of the first synthetic drumhead and other revolutionary products such as EMAD, Hydraulics, and the UV1 series, Evans drumheads are designed with the intent of solving problems for drummers. Regarded for high quality and consistency all Evans drumheads are made in the USA and feature Level 360 Technology., 18" resonant drum head made using a single ply of 10mil film coated with a frost matte coating, A fixed, internal overtone control ring is made for every microphone situation, from the studio to arena, The 5" offset mic port features a plastic sleeve focuses pitch and enhances the attach while providing protection for the port, Available in a frosted, onyx, smooth white and coated white version, All Evans drum heads are designed, engineered and manufactured in the USA