SD-R50-1816x2426-72x96 inch sliding glass doors. Also is says series 332-SGD
Hello,
Thanks for reaching out! There is a chance that we can help, however, I am not able to identify the roller you need based on the door information provided. To identify the right replacement, I'll need to see a photo of the roller completely removed from the bottom of the door.
I've included two tutorials below that detail how to remove the rollers and the information needed to properly identify them.
To be quite honest, this isn't a simple project and it is one that will involve more than one person. You should expect that you'll need to take down the door a minimum of two to three teams for the identification and installation process.
Please let me know if you have any other questions in the meantime.