Enjoy the strong support and convenience of the new 40cm high Standing Black Metal Base by Zinus. Compact packaging allows for tight interior spaces such as stairs and hallways. Assembles easily in minutes with no tools required, Strong mattress support with steel slats prevents sagging and increases mattress life. The new convenient and all in one mattress foundation solution includes rounded legs so no additional frame is needed. Another comfort innovation from Zinus. Pioneering comfort