Selling a queen-size foldable box spring (9" height) in excellent condition for $90, includes a brand new, never opened cover. Non-smoking house; however, I do have a dog. ZINUS No Assembly Metal Box Spring / 9 Inch White Mattress Foundation / Sturdy Metal Structure, Split Queen. Bought on Amazon, here: https://smile.amazon.com/gp/product/B0077UCFXG/ref=ppx_yo_dt_b_asin_title_o0... <https://smile.amazon.com/gp/product/B0077UCFXG/ref=ppx_yo_dt_b_asin_title_o00_s00?>ie=UTF8&psc=1 —Kristina