Loctek Standing Mount Sit Stand Workstation Gas Spring Laptop Mount Stand for 10"-17" Notebook(S1L) Gas spring counterbalance technology, allows user to switch work position from sitting to standing easily. Generous work surface, perfect for 10-17 laptops, from the MacBook Air to the MacBook Pro. Supports laptop weighing 2.2-15.4 lbs. Can be used as a supplementary surface for writing or drawing with a graphics pen tablet. Designed to perfectly complement the look of your MacBook Arm easily adjust to support an ergonomically correct workstation; more comfortably, reducing neck, eye and back strain Made of aircraft aluminum, providing long-lasting use. Quick and easy installation, both gromment and clamp basement are available.