Fellowes Energizer Foot Support. Invigorating rubber surface with diverse massage textures targets pressure points. Elevates feet and legs to help relieve lower back pressure and improve posture. Free-floating platform allows for intuitive rocking motion to help promote lower leg movement. Scissor motion height adjustment provides three platform height settings (4" 5-1/4" and 6-1/2") and up to 25 degree tilt .