This is Brand NEW Replacement Diaphragm GM-M-75 that fits many D.A.S models. This 8 Ohm diaphragm is an exact fit and replacement for the following D.A.S. Audio Enclosure, Speaker Box or HF Driver: D.A.S : Aero 12, 12A, 20A, 40A, 50 D.A.S : Artec 320 D.A.S : Event 208A, 210A D.A.S : HQ112.43, 112.64, 112.95 SF Monitor, SF 112 D.A.S : Road 12A, 15A, 12A.Net, 15A.Net D.A.S : WR6412, 6415 D.A.S : M80, M75, M75N Driver