Eliminate the need for a box spring, purchase a platform foundation by Rest Rite for your Double mattress. Rest Rite's 18 in. Double Platform Metal Mattress Frame instantly transforms your existing bed into a platform bed, making under the bed storage easily accessible. This mattress foundation provides you with 18 in. of under the bed useable storage space, traditional beds only provide 6 in.- 8 in. of storage. Rest Rite's platform frame not only provides additional storage, it's a fabric free option that is free of dust mites and allergens. The compact size also allows for easy transport through narrow spaces like stairwells or elevators. Constructed of 100% steel in a protective black anodized coating, this heavy duty metal mattress foundation will support up to 1,200 lbs. This mattress foundation can be used independently or with traditional bed frames, optional headboard and footboard brackets are available. Assembles in minutes.