The Evans Tri-Center Conga series removes the issues with natural skin heads while simulating the full, bright sound and feel of animal skin. With an extended collar that accommodates larger counter hoops, this drumhead enhances the fundamental tone by reducing overtones and adding weight to the center. For TocaTM Professional Models with "Easy Play" hoops and LPTM Classic Models with "Comfort Curve" hoops, use EC1100, EC1175, and EC1250. These are for LPTM Gionvanni Models with "Extended Collar" Hoops: EC0975, EC110E, EC1175E, and EXC1250E.