This is an EV factory original diaphragm that fits many Electro Voice models. EV redesigned this diaphragm about 5 years ago, so if you have an older model it may look slightly different than our picture of the new 81514XX diaphragm.

1.25" voice coil
1" Throat
8 ohm

Here is a list of some of the part #'s:
DH2001
DH2005
DH 2010
DH2010A
DH3 (some models)

We are an EV factory authorized service center and use this part frequently. No soldering needed and the diaphragm is self centering for an easy install. Any questions, just let us know.