Used: ET9 Extension tube for Rolleiflex 6000 and Hy6 cameras
The ET version of the extension tubes has the modern electronics that will support the newer autofocus lenses. This is probably the most often used size - often to get a little closer with portraits, etc. The extension tubes stack so they can be used with other tubes or even the bellows extension.
This ET9 (9mm) extension tube is in excellent condition.