Kensington Solemate Plus Adjustable Footrest, 21w x 14d, Gray (56146)
Reduce muscle strain and fatigue by supporting your legs at an optimum angle. Angle adjusts 30 degrees and locks into place with a simple press of the foot, while height adjusts tool-free from 3 1/2 inches to 5 inches. Nonskid surface plus nonskid feet for stability.