Replacement rollers for aluminum sliding windows

Thanks for posting. I'm afraid I'm not sure if we're going to have an exact match for this roller, but to know for sure, we'll need you remove it from the window and show us the roller from different angles. Specific dimensions, such as the width, height and thickness of the housing, as well as the size of the wheels, would also be useful. From there, we'll try and narrow down what you need. Many thanks.