Glass Door Roller

Thanks for reaching out to us! This patio door roller appears to be missing its housing. When I've come across rollers similar to this, we've recommended either the 81-278 or the 81-279 but you'll need to remove the housing from the door to compare the dimensions. 

The difference between them is the diameter of the wheel.

Alternate image for 81-278

Alternate image for 81-279