This is the Nikon Z-mount 2x teleconverter, the Z TELECONVERTER TC-2.0x. I purchased it new, but I'm selling it because I haven't used it much. I kept it in a dehumidified storage box, so both the exterior and interior are in very good condition, I think. There are no issues with its operation. Please refrain from purchasing if you are concerned, as this is a used item. ＜Included Items＞ Front and rear caps, original box, instruction manual