Excellent shape memory - Remains constantly active, reducing the number of archwire changes. The advanced metallurgical composition delivers more constant force for efficient tooth movement. Ultra-smooth finish reduces friction enabling teeth to move easily along archwire. Excellent initial archwire for leveling, aligning and rotating. Unsurpassed quality at an economical price! Laser etched midlines*Upper-3 Black Laser Marks *Lower-1 Black Laser Mark. (Pack 10)