Used brake caliper slide bracket.  This is for the rear brake caliper (single piston) with the JL9 (BASE MODEL) brakes ONLY, and works on either side (LH or RH).  Casting # K332-123C.  Listing is for 1 bracket as shown.  Fits the following:

97-04 Corvette (all models)
05-13 Corvette w/ JL9 (BASE MODEL) brakes only

The item in the photo is the exact item being sold.