18 RESONANT DRUM HEAD WITH A SINGLE PLY OF 6.5MIL FILM. A FIXED, INTERNAL OVERTONE CONTROL RING IS MADE TO BE MICROPHONE FRIENDLY, FROM THE STUDIO TO ARENA. A FIXED, INTERNAL OVERTONE CONTROL RING IS MADE TO BE MICROPHONE FRIENDLY, 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.