Name:         Z-6.0.8-System Startup.sea
Version:      6.0.8
Released:     October 1991
Description:  International Macintosh System Software

The enclosed file is a self-extracting archive of a Disk Copy 1440K disk image.  To use, download, double-click the downloaded file (this decompresses it), and use Disk Copy to create a disk.

Disk Copy can be found in the US Utilities folder posted here.