This is a high quality aftermarket diaphragm that fits For many Electro Voice  models.

Specs:
Overall Diameter: 3.125" ( 79.38mm)
Voice Coil Diameter: 2" ( 50.80mm) 
Diaphragm Material: Titanium
Nominal Impedance: 8 ohms
DCR: 5.0 ohms. Just like the original!

Here is a list of the driver part #'s:
ND2-8 and ND2S-8.

Here is the list of some of the cabinet model #'s:
EVF Series:
EVF-1122S/64, EVF-1122S/94, EVF1122S/96, EVF-1122S/99, EVF-1122S/126, EVF-1152S/43, EVF-1152S/64, EVF-1152S/66, EVF-1152S/96 
EVH Series:
EVH-1152S/64, EVF-1152S/66, EVH-1152S/94, EVF-1152S/96, EVH-1152S/99
Other Models:
TX 2152, XLD 281, XLD 291, XLE 181, XLE 191, ZX3, ZX5 and more.