Continental Mattress Sleep Twin XL 5″ Fully Assembled Coil Box Spring For Mattress, Size Price: $236.25 (as of 03/05/2021 07:54 PST- Details) & FREE Shipping.

STRONG AND STURDY: RSAs prefer selling steel foundations because they’re stronger
WORKS WITH ALL MATTRESSES: this box spring is good for all mattresses
NO ASSEMBLY REQUIRED: Shipped fully assembled and ready to use, open the box and the mattress is ready to use

Available to ship in 1-2 days.