I recently purchased a foam mattress somewhere else and the manufacturer recommended that slats should be less than 3” apart, for this reason I had to buy a boxspring for my king size bed. We didn’t want to add any extra height to our bed, so we decided to buy the 2” boxspring. The website does not say how many inches the slats are apart on this boxspring as they claim they are made by different manufacturers. We picked it up and when we arrived home we opened the plastic so we could feel the slats. The split king size boxspring were in the same bag with the tops facing each other. We realized the slats are too far apart and can’t use it. We called the same night and they told us because we opened the bag, this cannot be returned. We didn’t even take it out of the bag. Just read their return policy before you buy anything because their policy is not flexible at all.