REMOVES UNWANTED FREQUENCIES, BUT RETAINS THE DESIRED ATTACH, TONE AND FEEL OF YOUR TOMS OR SNARE. REMOVED OVERTONES BY RESISTING THE MOTION OF THE HEAD BY LINKING THE VIBRATING HEAD TO THE COUNTER HOOP. REMOVED OVERTONES BY RESISTING THE MOTION OF THE HEAD BY LINKING THE VIBRATING HEAD TO THE COUNTER HOOP. 6 QTY. PER PACKAGE. USE MULTIPLE MIN-EMADS ON A SINGLE DRUM TO OFFER FURTHER DAMPING. ALL EVANS DRUM HEADS ARE DESIGNED, ENGINEERED AND MANUFACTURED IN THE USA.