Voice Coil Diameter: 44.4 mm (44.5 mm Universal  )

Overall Dimension:  75 (+/-1）mmDome  

material: Titanium

Impedance: 8 Ω

It fits for the drivers :

Series: 

    2415, 2415-H, 2415H-1, D8R2415, D8R2415H-1, 2416, 2416-H, 2416H-1, D8R2416H, D8R2416H-1, 2417, 2417-H, 

    2417H-1, D8R2417H, & D8R2417H-1, 2152, 2152-H, 2155, 2155-H

   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: MR-802, MR-822, MR-825, MR-826, MR-835, MR-838.

    SR Series: SR-4722, SR-4722A, SR-4722X, SR-4735, SR-4735A, SR-4735X, SR-4738, SR-4738A, SR-4738X

Package  :

2 pcs  Replacement  Diaphragm