Pioneer Lonesome Carboy "AD-310E" Unused, Extremely Rare! Size conversion adapter for sale. Used when installing an E/2 size stereo using a D size stereo installation kit. D size → 180mm E size → 150mm E/2 size → Half the height! "Originally, I intended to sell it unopened"... However, when I thought about explaining the product, I judged that it was impossible with just text, and reluctantly opened it. Since this size doesn't exist in modern Reiwa era, please read the instruction manual carefully. I think this is a product for collectors... A must-have, super rare item for enthusiasts! Classic cars, retro cars, 80s heroes Neo-classic, street racers I'm currently selling it after reluctantly opening it, but I haven't stapled it. Of course, that's up to the winning bidder. Pioneer Lonesome Carboy Conversion adapter / Unused!! Since this is from the Showa era, please be sure to check all the attached photos and request a "No Claims, No Returns" transaction. # Absolutely not for those who are overly sensitive. Cassette deck, Centrate Clarion City Connection Alpine, Kenwood Nostalgic Hero