Resilient Sounds ES-65C 
6.5" Speaker System pair
RMS 75/150W per each
Carbon Fiber Cone!
4ohm 1.2" TIL Voice Coil
30 oz Magnet
EVA gasket ring
Sensitvity 90DB
Frequency Range 50Hz-20Khz
Mounting Depth 70mm/2.7"
Dounting Diameter 148mm/5.8"
 
The perfect match for tweeters!
https://www.resilientsounds.com/product-page/est-1-1-neo-tweeter