Fellowes Corvisio Sit Stand Workstation Black 8091001 The Corsivo sit-stand converts your existing desk into a sit-stand workstation. Easily transition from sitting to standing with gas spring height adjustment. Spacious upper platform holds two monitors, or a monitor and laptop and the bottom level holds a keyboard and mouse. Device channel on top platform conveniently keeps phone or other accessories within reach. This sit-stand converter is compatible with Fellowes single and double monitor arms and ships fully assembled.