Diaphragm For JBL fits MI 261, MI 291, MI 630, MI 631, MI632, 8 ohm Horn Tweeter

Overall Diaphragm Diameter:  3.25″
Voice Coil Diameter:  1.75″ with titanium dome.
Nominal Impedance:  8 ohms.  DCR is 4.1 ohms just like the original.

Here is a list of the driver part #’s:
2415, 2416, 2417, 2152 and 2155 models.

Here is the list of some of the cabinet model #’s:
G Series: G-730, G-731, G-732, G-733, G-734, G-791
MI Series: MI-261, MI-291, MI-630, MI-631, MI-632, MI-632A, MI-634
MR 800 Series: MR802, MR805, MR822, MR825, MR826, MR835, MR838
SR Series: SR4722, SR4735, SR4738, SR4722A, SR4735A, SR4738A
SR X Series: SR4722X, SR4735X, SR4738X