A 2" to 1.25" eyepiece adaptor as supplied with many small apochromatic telescopes including the Sky-Watcher Equinox range.
The adaptor fits directly into a 2" focuser and the 1.25" eyepiece is then secured with a thumbscrew, which acts on a non-marring brass ring to avoid making an impression on the eyepiece barrel.
This item is used and in excellent condition.