Large, 46" wide adjustable desk riser easily allows you to go from sitting to standing. Desk riser raises up to 20" and lowers to 5" to optimize the ergonomic work position for people of all heights. Straight up-and-down motion minimizes the required desk depth to 23". The 25-3/4" x 11-1/4" retractable keyboard tray slides in and out, rising with the unit. Desk riser includes grommet hole for mounting monitor arm or running cables. Unit holds up to three monitors, a laptop and more with a 45 lb. capacity. Desk riser works with optional Lorell Deluxe Floor Stand (sold separately) to create a complete sit-to-stand desk or an extension to your current desk.Large, 46" wide adjustable desk riser easily allows you to go from sitting to standing. Desk riser raises up to 20" and lowers to 5" to optimize the ergonomic work position for people of all heights. Straight up-and-down motion minimizes the required desk depth to 23". The 25-3/4" x 11-1/4" retractable keyboard tray slides in and out, rising with the unit. Desk riser includes grommet hole for mounting monitor arm or running cables. Unit holds up to three monitors, a laptop and more with a 45 lb. capacity. Desk riser works with optional Lorell Deluxe Floor Stand (sold separately) to create a complete sit-to-stand desk or an extension to your current desk.