You have an Acorn sliding door that has gone out of business. Your only bet is to remove a roller from the door and match up its physical details. I've made a list for you on the right side of this page, but there is no guarantee that one of these are what you have. The only way to know for sure is to take out what you have now.
Yes, you are correct.
His door has gone out of business.
That's why he wants to fix it.
Thank you so much! I really appreciate the help.
I believe I have the same door and need new wheels. Was this owner successful and did they find out which wheels it needed? MY door is 8 ft by 4 feet double pane glass
