Ducati ST2 rear brake caliper bracket. Ducati wants $136 for this part new; you get it for a fraction of that price. Taken off a 1998 Ducati ST2 in good running condition; works fine and is undamaged. Compare to the  photo and if it looks like yours, then this part will probably work for you.

See my other auctions for more Ducati parts. Tate: 949-378-thirtytwo26.