Beautyrest low profile (6") split king box spring. Two years old but not used. Came with a mattress that is used on a platform bed. The two pieces are stacked on top of each other in picture for storage but would be placed side by side with king mattress on top. Has been stored in smoke and pet free home with whole-house HEPA air purifier. Just occurred to me to sell it. $75 pick up in Mendham. PM me if interested.