Evans snare side clear 500 heads feature a single ply of 5mil film and are designed to produce a dark, throaty sound that is best suited for deep drums or heavy rock performances. Evans Level 360 technology is incorporated to extend the level playing surface of the drumhead, 360 degrees around the drum. The vertically enhanced collar design guarantees even contact with the critical bearing edge of the drum shell, resulting in: ease of tuning, extended pitch range and optimum quality of sound. Evans Level 360 technology resolves the age-old dilemma of traditional synthetic heads consistently not fitting the drum shell without using considerable force. 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., 14" glass (clear) snare resonant drum head made using a single ply of 5mil film, 5mil head offers great snare response at high dynamic levels, Best suited for deep drums or heavy rock performances, Also available in 13", All Evans drum heads are designed, engineered and manufactured in the USA