-Removable color coded identification mark. -The archwire slot is machined to provide superior sliding mechanics and less friction. -A rhomboid shape, twin tie wing design and easy ligation add up to a superior design. -Aesthetically pleasing translucent ceramic appears nearly invisible. -The low profile and smooth, rounded edges add to patient comfort. -Advanced 99.9% pure Polycrystaline Alumina for superior strength and fracture resistance. -The crunch grip mechanical lock base ensures optimal bond strength.