This is used carbon boom, extremely stiff with tapered arms that become thicker and super-stiff tail piece (see the carbon reinforcement. In very good condition, very little damage to grip area. The hinge flap has some strange rubber plugs missing and the friction pad is thus a bit loose, but no problem. Has integrated RDM shim. Very smooth adjustment system with secure double pins. No problems with this boom, I am switching to a lighter less-built up boom, but if you like extra-stiff beyond any other characteristic, this is your boom. $300, shipping extra, or pick up from me in Chicago or I bring down to Champaign sometime in the future.