1pcs

Overall Diaphragm Diameter:  2.9375" (74.61mm)
Voice Coil Diameter:  1.75" (44.4mm) 
Nominal Impedance:  8 ohms

Here is a list of the driver part #'s:
2420, 2421, 2425, 2426, 2427, 2461, 2470 models.  ***It will also fit the LE85 models, but some of them you will need to drill the 2 pin holes a little larger to fit.***

Here is the list of some of the cabinet model #'s:
3678, 4660, DD55000, S2600, S3100 and many more.