Features: Fully Translucent Look. Purest Polycrystalline, 99% Alumina, material resists breakage. Compound contour torque-in-base design for precise fit and tip, torque and in/out movements. Contoured auxiliary hooks enhance patient comfort. Mechanical dove-tail grooves/porous surface. Colour-coded site-guides are included for easy and accurate bracket placement. Pack of 5 Sets (MBT) - Upper & Lower 5x5. Hooks on 3's; 4's and 5's.