Box was opened and retaped when I got them, but I am not sure what's wrong with these liners.  NONE of them fit either one of my Littermaid boxes. I don't know if some others were switched in the box or what, but the entire 12 pack, every single one of them, the trays are about a 1/2" too narrow and they sort of look different. They don't look like the ones I've been buying for my smaller littermaid box, or my largest littermaid in over a year.