The Ambassador Ebony 5" Black DynamO features open resonant tones with a reflective black look and a pre-cut 5" hole with a DynamO reinforcement ring. Constructed with 1-ply of 10-mil Ebony film, Ambassador Ebony drumheads are ideal for bass drum resonant heads and are the industry standard. The pre-cut 5" hole is perfect for external bass drum mics. Ambassador Ebony heads are available is sizes 18" - 24".