This AR-12 Portable Aluminum Laptop Riser with 6-level heights adjustments provides the best visual angle and fix your posture and reduce neck & back strain while using laptop. The hollow design increases airflow and dissipate the heat buildup. The portable laptop riser fits for 11”-15” laptop. The anti-slip rubber pads hold your laptop firmly in place while prevent scratches from your laptop. This laptop stand is designed to be portable; you can put it into your bag and take it to office, coffee bar or anywhere you want to go.