One TANNOY tweeter diaphragm 7900-0550, suits many models.

One genuine factory TANNOY tweeter diaphragm 7900-0550, suits many models.

Diaphragm only, no Ferro-Fluid, no magnet. 

Ferro-Fluid available, see separate listing.

https://mainlytannoy.com/products/high-grade-original-tannoy-ferro-fluid-0-6ml-in-syringe. 

0.6ml good for 5+ tweeters, Tannoy used to issue 0.15ml per tweeter which was more than plenty.

To order, lead time varies 1 to 6 months, sometimes in stock, ASK ASK.  If no stock, order and get in the queue.

7900-0550 fits HF Diaphragm Tannoy chassis HF Diaphragm 3133/ 3833, Glenair, V Net12, V12, V15.

In fact fits most 12" & 15" with tulip tweeter.