This Is A Brand New Aftermarket Titanium Diaphragm Replacement for QSC SR-000106‑00, B&C DE10-8, D-BCMMD10-8 Please Look And Make Sure The Diaphragm You Are Ordering Matches The Pictures Above & The Specs Below Voice Coil Diameter :1" (25mm) Impedance :8 Ohm Outer Ring Diameter : 2" (51mm) Length Of Diaphragm :4" (102m)