Submitting pic on seperate email of old sliding window roller assembly. Have 12 large heavy aluminum dual pane windows in Mexico and need to replace with quality roller assemblies. 2 and 1/8"tall, 1/4" x 3/8" wide with sheet metal screw to anchor in place. Windows were assembled on site three years ago in central Baja Mexico by a small window installer from Ensenada 7 1/2 hrs north there and 2 hrs south of the border. Suspect aluminum frames were imported from Southern calif.