The thickness of the drumhead film is a determining factor in how fast the head will vibrate. The thinner the material, the faster it vibrates, producing higher frequencies and more noticeable overtones. Thicker drumhead film generates lower relative frequencies. All of our heads are made exclusively from Aquarian’s ultra-responsive 3,5,7 and 10mil thick NuBRITE drumhead film. Music City is an Authorized Dealer for Aquarian Drumheads products.