The Safco Sled Base Stack Chair Cart is an option for large volume office chair stacking, storage and transportation. The cart is mobile on four durable wheels and is supported by a silver steel frame. Can stack 20 units depending on the chair. For Agiliti, Veer, Pique, Reve, Vy and Currant High-Density Stack Chairs. Material(s): Steel; Overall Material Type: Metal; Color: Silver; Color Family: Silver.