Simply breathing and speaking can expel droplets which may contain contagious diseases, singing, shouting and coughing even more so | Lookout Sneezeguards are made of 5mm crystal clear acrylic and are designed for face to face interaction and to limit contact | They simply slot together and sit on the desktop | no assembly or installation required | Available in two sizes | 5mm Crystal clear acrylic | Slot in feet allow the screen to stand without mounts | feet are included with screen