3M Adjustable Footrest FR530CB CharcoalAdjustable Foot Rest. Ergonomic design positions you properly to help reduce back, neck and leg strain and prevent fatigue. Independently adjustable height and angle help you maximize proper body alignment and comfort. Charcoal Grey and Black. Reduce strain and fatigue on legs, back and neck. Both models offer easy, foot controlled, platform tilt adjustment and sturdy steel construction.