Selling a legendary high-end tweeter from Isophon. It's a hard to find Model, KK8/8(8 ohm version). Very famous tweeters for DIY projects all over the world. You can easily find their specs/crossover design on the internet. I can send specs about this tweeter per your request. New old stock driver in 100% Working condition. They are used on many major brand name speaker systems in the 80s'. For example: it is a direct OEM replacement unit for some early KEF& Monitor Audio speaker systems. Priced for one driver. It will be Securely Shipped via USPS Parcel Select Ground/Fedex. Thanks for looking.