Check the listing for details. BMS 4538 Aft Diaphragm - Fits Many Models - Free Shipping!. Condition: New. Listed at 61.70 USD. BMS 4538 8 ohm AFTERMARKET DIAPHRAGM ***NEW STOCK*** Price is for (1) one diaphragm. If you need more than one, just change the quantity. This is a high quality aftermarket BMS diaphragm that is identical in sound just like the original diaphragm. 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 and more. We are a repair shop and use this part frequently. No soldering needed and the diaphragm is self centering for an easy install. Any questions, just let us know. FAST FREE SHIPPING IS WITHIN THE UNITED STATES ONLY. INTERNATIONAL SHIPPING WELCOME!!! Our shipping costs do not include your country's customs charges, taxes and other fees. Please do NOT ask us to send as a gift or to lower the declared value on the customs forms. PLEASE READ: We can ship Internationally using USPS First Class or Priority Mail. USPS Priority Mail International includes tracking and insurance. USPS First Class International has limited tracking, NO insurance and is slower. Depending on your country's customs some orders may take over 30-45 days.