Evans Tri-Center Bongo Head, 8-5/8 Inch Tri-Center Bongo Head, 8-5/8 Inch Bright, penetrating slap tone with a full, round low-end Etched texture simulates the feel of animal skin while avoiding the problems associated with natural skin heads Tri-Center minimizes overtones and adds weight to the center to enhance the fundamental tone All Evans drum heads are designed, engineered and manufactured in the USA