Amazon Basics Smart Box Spring Bed Base, 5-Inch Mattress Foundation – Twin Size, Tool-Free Easy Assembly Price: $81.05 (as of 22/03/2023 17:15 PST- Details)

Offers the look and functionality of a traditional box spring, but made from steel for longer-lasting durability sturdy enough to support any spring, foam, or hybrid mattress
Durable steel frame and horizontal slats provide sturdy, reliable support for any same-size mattress
2-piece fabric top and bottom covers zip securely together for full coverage; cover is removable for spot cleaning