Upgradable to carry additional display: No, Material: Aluminum, Color Options: Silver, Desk fixing options: Freestanding base included, Minimum desk thickness: Any, Maximum desk thickness allowed (inches): Any, Spring assisted height adjustability: No, Height adjustable: Yes. The VFS-Q is designed to support 4 monitors in a 2 x 2 configuration. It can be also converted to support single, dual or triple monitors by attaching VESA heads directly onto the vertical post.