$75 · 3M Adjustable Under Desk Keyboard and Mouse Tray (Sit/Stand)

Tucks fully below desk surface until needed - Adjusts 6.5" above to 9" below a work surface - Positive or negative tilt - Sit-stand capability for users 5' to 6' 1.5" - Dual-arm design for incredible stability, minimal keyboard bounce and outstanding knee clearance - Adaptable for straight, corner, cut-out and diagonal work surfaces - Requires minimum 27" width, unless corner mounted then 24" width space - Sturdy platform to minimize keyboard bounce - Smooth underside to eliminate bumped legs or snagged clothing