Diaphragm for BMS 4538 Aft Diaphragm - Fits Many Models - Free Shipping! 38bms 2406 8ohm

Outside Diameter: 2.75" (69.85mm)
Voice Coil Diameter:  1.5" (38mm) 
Nominal Impedance:  8 ohms
DCR: 4.5 ohms
Dome Material: Titanium
Voice Coil: Aluminum Wire

Here is a list of the driver part #'s:
4538 2406 and more.