Evans E-Rings are an easy way to control overtones from your drumhead. Overlay them on top of the drum and they flatten and round out the drum's sound making it easier to tune. Save time in the studio and get killer snare sound. A great value too, because they're reusable. The Standard pack consists of 12", 13", 14" and 16" rings

External overtone control ring that “floats” on the surface of the drumhead
Removes overtones and flattens the drumhead’s sound and allows for easier tuning
All EVANS drumheads are designed, engineered, and manufactured in the USA