TITANIUM DOME REPLACEMENT FOR THE FOLLOWING: 

Foster
/ Fostex replacement diaphragm for N30 series 8 ohm tweeters &
horns. The following is a partial list of models that use this
diaphragm: 025H30, 025H27, 0013252, 25H273, DC10/1501-16, H025N30,
H025N27, H025N08, FT300H, N08, PHT-404, PHT-405, PHT-406, PHT-408,
PHT-410, PHT-411, PHT-412, PHT-413, PHT404, PHT405, PHT406, PHT408,
PHT410, PHT411, PHT412, PHT413, PH-404, PH-405, PH-406, PH-408, PH-410,
PH-411, PH-412, PH-413, PH404, PH405, PH406, PH408, PH410, PH411, PH412,
PH413, HT-404, HT-405, HT-406, HT-408, HT-410, HT-411, HT-412, HT-413,
HT404, HT405, HT406, HT408, HT410, HT411, HT412, AND HT413, PAD26S,
Ampeg 86-515-08, Yamaha JAY68625, JAY 68625, Carvin 025N01D, Crate
PE-15H, Crate PE15H, Crate PE15-H, Roland KC500, Roland KC-500, Roland
KC550, Roland KC-550, PAS H30 PH88 8017 A3 S0, Selenium RPDT150, DT150,
RP-DT150, DT-150, DT150-OEM, RP-DT150, SWR, Tapco Mackie Thump TH-15A,
Thump TH-12A, and many many more.

Inside diameter of voice coil :25.5mm (1inch).

Frame long :70mm (2-3/8 inch)

Nominal Impedance: 8 ohm.