Aft Diaphragm for Celestion CDX14-3050 CDX20-3000 8 ohm Driver - FREE SHIPPING!

Specification:

Overall Diaphragm Diameter:  3.75"
Voice Coil Diameter:  3" 
Impedance:  8 ohms. DCR is 6.6 ohms.

Here is the list of some of the model #'s that it will fit:
CDX14-3050 and CDX20-3000 and more