Fiberskyn replacement head for copper and aluminum doumbeks. Head has an inside diameter of 8-3/4" and a crown depth of 3/8". Might not fit all doumbeks. Remember to measure your drum carefully. This amazing Remo S Series Fiberskyn Doumbek Head-8-3/4"-Diameter-3/8"-Collar can fit for a CLASSIC/ NEW GENERATION darbuka of GEF / ZAZA from egypt . DA-3387-FD 8.75” 22.22cm