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For a king-size bed, choosing between a traditional box spring and a modern metal foundation depends on your mattress type and how much height you want to add. Metal foundations have largely overtaken wooden box springs because they offer more rigid support for heavy memory foam or hybrid mattresses and are much easier to assemble in a large king size. Expert Recommended King Foundations buy king box spring

Mainstays 9" High Profile Easy Assembly Smart Metal Box Spring Walmart& more Go to product viewer dialog for this item. Big Fig Mattress Big Fig Size Ultra Low