Ergotron TeachWell Mobile Digital Workspace - 38.58LB Cap. - 4 Caster - Steel, Plastic, Phenolic - 31x24.1x51.8" - Graphite Gray 24-220-055 Product Type: Computer Cart Application and Usage: Projector, Tablet PC Maximum Load Capacity: 38.58 lb Casters: 4 Color: Graphite Gray