Twelve South HiRise for MacBook | Height-adjustable stand for MacBooks & Laptops HiRise aligns your MacBook or laptop with an external display for the ultimate dual-screen setup Non-slip arms hold and protect all size MacBook's - from 11-inch Air to 15-inch Pro Rear piston easily adjusts the height of your MacBook/Laptop up to 6 inches Elevate MacBook/Laptop for improved airflow, cooling, quieter performance, and out of harms way Made from aluminum for a sturdy stance, and an easy grab-and-go situation