Evans EQPC1 is a clear non-slip plastic bass drum patch which increases attach and strengthen the head without affecting sound quality. 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., Single pedal black version, Protects the bass drum head from pedal fatigue, 2 patches per package, Increases attack without affecting sustain or low end, All Evans accessories are designed, engineered and manufactured in the USA