Patio Door Roller

I'm afraid that I don't recognize this roller. Before we can research this further, I'll need the dimensions of the part.

If possible, please measure the width of the back end of the housing, the height of the back end of the housing, and the diameter of the wheel. Then, please write those measurements out in your response to me so that I may review. With that data in hand I'll try to find you a good fit.