Ergonomic keyboard slider tray (MOUNT-KB03B) from VIVO! Enhance your typing posture while using our under-desk keyboard and mouse tray mount. An adjustable and convenient workflow is far more ideal and easy on the body as you type at a more ergonomic position. When not in use, simply slide the tray under the desk and out of the way.

https://www.amazon.com/VIVO-Adjustable-Ergonomic-Underdesk-MOUNT-KB03B/dp/B01M2319VR