Two BRAND NEW, NEVER USED, still in original packaging, twin XL boxsprings, can be used separately for twin bed or together for king bed. These are from Macys and great quality. They provide a sturdy base designed to work with mattresses that do not require a high-profile box spring.
Single: 38 in x 80 in, thickness is 5.5 in
Together: 76 in x 80 in, thickness is 5.5 in