The Aztec E-Z Chair is an all-plastic rebar support for use in tilt-up, precast, or poured-in-place decks, and post-tensioned construction applications. It offers easy installation, strength, and stability without rust and bleed marks, particularly when aesthetics and finish are important. Made with lightweight recycled material, it is often specified for use with epoxy-coated rebar in highly corrosive environments. Concrete Accessories by Dayton Superior. 800-745-3700.