Screen-mountable design with an adhesive back that adheres to computer screens and smooth surfaces for storing pens vertically increasing the efficiency of using office space | Durable black plastic construction with a soft finish resists stains and is easy to clean while maintaining the professional look of the workspace | 120g lightweight design allows easy repositioning and transportation between different workstations without adding extra size to your setup | 3-piece kit includes two rectangular holders and one square holder providing organized storage for pens, pencils, markers and small office supplies