Each wall includes a mix of PET and frosted acrylic panels that can be arranged to best suit the workspace. PET panels: Absorb 85% of ambient noise (NRC 0.85) Are made from recycled, eco-friendly materials. Are tackable for posting of notes and photos. Can be cleaned with up to 75% isopropyl alcohol. Can be cleaned with a solution of mild soap and water Frosted acrylic panels: Enhance privacy without blocking natural light. Can double as a whiteboard when used with water-soluble dry-erase markers. Starter Walls are freestanding Add-on Walls can be easily connected at right angles and straight lines to accommodate any work or learning space. Built-in cable management tray helps keep cords tidy. Overall dimensions: 53" W x 15.75" D x 70” H. Vertical supports (2): 70" H Panels (Starter and Add-On Wall models come with some/all of the following): Large PET panel (2): 33" W x 21.1" H. Small PET panel (2): 15.75" W x 21.1" H. Large frosted acrylic panel (1): 33" W x 21.1" H. Small frosted acrylic panel (1): 15.75" W x 21.1" H