I CANNOT SHIP TO ALL COUNTRIES. Please ASK before buying !! THE Ribbons !!!! Extremely rare pair of vintage RIBBON Super Tweeters (same as GAMMA / RESPROM). These are everlasting super high fidelity super tweeters manufactured late 80s till beginning of the 90s. Same or similar to the legendary Kelly MkII / Decca DK30 / London / Supertweeter. Frequency response 2500 - 40000 kh !!! Best to e filtered from 7000-10000 kh up. Once you put these in your system you will understand that lots of music details were not being heard from you in your listening experience. Huge and heavy Alnico magnets. Beautiful detailed sound - a piece of art. Good condition for their age. Working. Best for custom DIY projects. More than 2,0 kg each Take a look at my other items. They are as Unique as this one is. NOTE: - Item is based in Bulgaria. I cannot ship to all countries. Please ask me before buying !!! - Please note this !!!!!! - I will require your PHONE number E-MAIL address in order to be able to send the parcel. When the courier arrives at the delivery address there should be someone to accept the parcel !!!!