Description This is a quality replacement diaphragm which fits Mackie SRM-450, C300Z, P-Audio, BMD-440, BMD-450 and DriverB23. Coil Inner diameter : 44.4mm (1.75″) Overall diameter : 2.78″ Overall length : 4.18″ Nominal Impedance : 8 ohms They are not an original part, but work and fit perfectly. You will receive: 1 x Diaphragm ** FREE POSTAGE**
