Patio door slider missing rollers

Thanks for posting. Unfortunately without seeing the original rollers, there's really no way of saying for sure what rollers you might need. There is just too much variation with this hardware; even if we knew the exact brand we probably wouldn't be able to narrow it down, with very few exceptions. Unfortunately there's no way to really say what you need without obtaining the old rollers for viewing. I apologize for the inconvenience. 

We may be in luck. With a good deal of squinting, I've determined this label is an Artdor Sliding Glass Door. This name has been associated with old doors like yours, and in that case our best bet was the 81-140 Sliding Roller. Without seeing the original I can't guarantee this is what you need, but it's our best bet for you. Take a look and let me know what you think. 

Hey Javier. Glad to hear the 81-140 worked out for you! For this other sliding door you speak of, if you want, send me pictures of the roller out of the door and tell me how the dimensions differ from the 81-140, and I can see if we have something better.