This lovley 3/4" soft dome Danish Vifa tweeter was pulled from a working Tannoy bookshelf speaker years ago.  It's been in storage ever since.  On testing, it sounds great, measuring 6.3 Ω.

The diameter of plastic mounting plate is 3 11/16", and the driver itself is 7/8" deep from top of plate to back of magnet.

Please see pictures of actual item for detailed visual description.

Sold as is to highest bidder, please see pictures of actual item for main description.

Also ask any questions prior to bidding.  I'll answer as best I can.

Buyer to pay within 3 days of auction end; I will ship within 5 business days, usually much sooner.  Please look at my feedback and bid with confidence.  Item will be shipped well packaged and fully insured.  If you live in or near Los Angeles, I'm happy to have you pick it up in person to avoid shipping costs/risks.

Best of luck!