These are actually compatible with the MailStation 2. There are a lot of generic "compatibles" that say they are compatible with MailStation 2 797-M 797-Q and they aren't. See the U-shaped bracket protrusion on the left side (as you look at the label. The "compatibles" without that only work in the original MailStation. On the downside the last Staples cartridge I used lasted less than 100 impressions.