Proper height adjustment of the monitor is the key to reduce eye, neck strain and fatigue. Once seated at a comfortable height, your line sight should line up with the middle of the monitor. The DAC Monitor Risers feature a simple building block configuration and a visual design meant to have it blend in unobtrusively on your work surface. Molded in rigid black plastic with 30% recycled materials DAC ergonomic products are "Built tough, priced right" for years of service to help you be at your productive best.