1pcs

Specs:

Overall Diameter: 3.125" ( 81mm)

Voice Coil Diameter: 2" ( 50.80mm) 

Nominal Impedance: 8 ohms

DC resistance : 5-8 ohm 

size error ： +/- 1 mm

Here is a list of the driver part #'s:

ND2-8 and ND2S-8.