Manfrotto 290 MM294A3 Black Monopod (~60" Extended)
This is a nice heavy duty monopod made by Manfrotto. It is relatively lightweight and very sturdy, this would be an excellent monopod to give you lens support while shooting with extremely long lenses in the field. I use a monopod (not this one!) with a fluid head attached for my video work when I'm in tight spaces.
It has a 3/8" mounting screw for a tripod head.
This one is in good condition with moderate wear. The locks are all sturdy and everything works perfectly. It is ~60" tall when fully extended.