atrium series 311/312 sliding glass door

I'm afraid I can't tell you what your rollers are based on these stickers. I know this is the last thing you want to hear, but the only way you're going to know what they are is to remove them from the door ahead of time. There is no shortcut around that, it's just how patio doors are designed to work.

If you're okay doing that kind of project, then once you have the rollers out you can show me a picture of the back end, top, and sides. I would also appreciate dimensions if you can get them. With that data, I will do my best to find a match on our site.