One leg off of a Proline CX600B502D/S tripod. One of the features of the tripod is that you can remove the legs and use them as monopods. So here you go. A replacement leg or a monopod, whatever floats your boat.

15" collapsed, 47" extended. The foam rubber grip at the top has lost a little material at the bottom of it but nothing to prevent satisfactory usage. The locks work well and the carbon fiber is in good shape. Hold up that heavy lens or camera or have a light weight hiking stick