Specifically designed for macbook, this mount-it laptop riser raises the macbook to align with an external display to create an ergonomic work environment. The height adjustable stem raises the top of the platform from 4. 7 inches to 6. 7 inches with a max weight of 33lbs. The large solid base adds stability to the unit regardless of the height you choose to set it at. The anti-slip silicone pad firmly holds the laptop in place. Anti-slip padding under the base further increases the platform stability and prevents scratching the surface it sits on. Laptop riser features material: aluminum, steel laptop size: 11” to 15” max carrying weight: 33lbs height: 119mm (4. 7”) to 170mm (6. 7”) anti-slip padding: yes *macbook/ laptop not included.