Licensed Kickstart 3.1 for Amiga 1200. Compatible with Amiga 1200 only. It is a Kickstart 40.068 (Commodore Edition). You need them to use Workbench 3.1 in your Amiga.
You will get two 42 PIN modules. You should repleace your old modules with new ones. It is a specified ROM with labels from Cloanto with unique serial number.