Bootable flash disk for CPU card with DOC socket.

40 pin IDC 3½ "DOM Female to male adapter
In some cases, the pin 20 is removed by USB to IDE

2 GB, 40, Lodret, 27,2 mm

8 GB, 40, Vertical, 27.2 mm

512 MB, 40, Vertical, 27.2 mm

1GB, 40pin, vertical, 27.2mm