That’s right, just use the OCM Plastic Uni-Chair 4” Base Extension instead. Just stack as many 4” base extensions as you need plus a final Plastic Uni-Chair on top and you are ready to place your rebar or post-tension cable at the exact height on the job today! If time permits, OCM can assemble for you and ship right to the job. Avoid the fabrication productivity loss and jobsite safety concerns caused by rebar standees. Taller metal high chairs take days or weeks to make which costs time and money on the job. Just go with the OCM Plastic Uni-Chair 4” Base Extension instead—it really is an industry game changer!