Feature●Nominal Impedance: 8 ohms / DCR: 6 ohms●Diaphragm Material: Titanium / Diaphragm Height: 15.2 mm●Overall Diameter: 5" (127 mm) / Voice Coil Diameter: 3" (76.2 mm) Edgewound●This is a High Quality Aftermarket Diaphragm.Description This is a high quality aftermarket diaphragm that fits ALTEC LANSING 906-8A,as well as many Electro Voice models.