Come the source disks in a neutral plastic bag. In addition, they are minimally larger than the Jiffy discs that I knew so far. My mini-greenhouse cultivation has in the ground round recesses where these discs normally fit exactly into it. The offered here are slightly larger. But: It's not matter anyway, because they are not used in the dry state and the fit is here rather a gimmick.
After a short swelling to form the usual bales which you can then populate with the seeds. The peat not really different from others that I knew so far. Only the power envelope appears to be a slightly different material.
All in all I can say is: My seed has taken root as expected in the source disks and is then repotted soon.