Evans Hydraulic Glass Tompack, Standard (12 inch, 13 inch, 16 inch) Standard Tom Pack (12", 13", 16") drum heads with a thin layer of oil between two plies of film to suppress unwanted overtones Two plies offer consistency and durability for longer playing time A fat, deep and short sound pioneered by early 70's rock and roll Also available in blue and black versions All Evans drum heads are designed, engineered and manufactured in the USA