patio door is an MI 950
Thank you for reaching out to us. We believe your door is using the 81-090 sliding door roller assembly, though we cannot be certain. The image provided only shows the interior of the roller assembly; the exterior portion is still attached to the door. To properly access the assembly, you'll need to remove the door. Start by unscrewing the two screws at the bottom of the frame. Carefully detach the bottom rail from the glass panel. Once that is done, you can slide the housing out from the door rail.
Once you have the full roller assembly put together, review the specifications of the 81-090 to see if they match what you need.
Thanks for getting back to us. In that case, we'll have to see a complete roller assembly put together, which will require removing the outer housing from the door. That will help us narrow down some options.
The only difference is that the dimple on mine appear to be higher on the unit. Roughly 7/8ths of an inch down from the top or 3/8ths up from the bottom.
