Corded Track Made of: Non rusting Aluminum with powder coating. Sliders: Bearing sliders made with steel ball. Shade: Snow white Ivory Adjustable Size: 2.5' to 4', 4' to 7', 5.5' to 10', 7.5' to 14', 9' to 17'. This is Cord Operated Track made especially adjustable; it can be increased and decreased according to your window size. It is fully assembled so you can fix it by yourself also.