Series 1200
Code 130-1
Spec SGD-A2


Unfortunately, the given information is not enough to verify what door you have. As Paul stated above, there is a chance you might have the 81-030 tandem roller, but this is far from a guarantee. The only way to properly identify a patio glass door roller is to remove the original for reference. There is unfortunately no easier way; it's going to be an involved project any way you look at it.