Remo Fiberskyn S-Series drumheads provide a superb authentic drum sound when used on world percussion instruments. In fact they are the world's most widely recorded synthetic world percussion heads. Crimplock World Percussion drumheads are Type 4 conga heads. They feature a high collar glued WeatherKing style Fiberskyn 3 head with an angled crown and a Crimplock aluminum support rim (flesh hoop). Replacement heads available with 10" and 11" diameter.