REMO Conga Drumhead, Symmetry, 11.75" D2, FIBERSKYN Fiberskyn 3 M4 type 12" size (11.75" crown) D2 (diameter of aluminum channel) To the world's most widely recorded synthetic world percussion heads, Fiberskyn, Remo now adds to its World Percussion Drumhead Line the Crimplock Symmetry, Type 4, conga drumhead