This is the SONY teleconverter SAL14TC for α mount. I am selling it due to a change in mount to a mirrorless camera. I purchased it new and haven't used it much. I believe I only attached it and took a few shots just to confirm it after purchase. Therefore, the condition is considered to be very clean. The accessories are all shown in the first photo. Regarding storage, although it's not a dehumidified storage, it has been stored in a case with a desiccant in a lens container, and I have paid close attention to humidity. Please note that the mount is α A-mount. It is compatible with full-frame cameras.