Spinal Solution is a proud manufacturer of the finest quality mattresses and box springs, with the highest standards in durability, quality, comfort and beauty. All of the products are made in the USA to ensure that you get only the best! This item is part of the sensation collection, it has the following features: This box spring is uniquely designed to give you the kind of undisturbed sleep nature intended. Continental box. Meets federal standards 1632 and 1633 fire code.