Type-II HDA (Hard Disk Adapter) repro. These haven't been available new since the mid 1980s. Built and tested, made from new and NOS (many parts are obsolete, meaning the only source of some parts for this board being NOS (New, Old stock) from the 1980s).
This is the HDA you need to connect a F48 (FreHD, for 8in systems - see my other listings), or a Tandy Primary hard drive (all models 5Mb-70Mb except for the 8Mb Mod II hard drive), to your Model II, 12, 16, 16B or 6000.
Shipping will be $26 worldwide.