Apple HDI-20 1.4MB PowerBook Duo Floppy Drive and MicroDock Adapter M8061 M7781
It is Apple model M8061 (part number 590-0719-A) and M7781. Item is tested and fully operational. This drive and adapter will work with the PowerBook Duo 210, 230, 250, 270c, 280, 280c and 2300c, as well as the PowerBook 100 and Apple MiniDock.