In excellent condition, this is the light basic version of the Universal Astronomics Unimount. It comes with two five pound weights, and can balance an 8lb binocular. This one has the L-bracket, giving 4 degrees of movement. The base will take a 1/4 20 screw, and it also drops nicely into some tripods, like the Celestron one shown. It also goes nicely on a Bogen.
I'm only selling because I now have a pair of Zeiss stabilised binos, and its daft to have both.
New price is about $230. Selling these for $125.
The Fujinon's aren't included, nor is the tripod (but you can have the tripod for $50)