Continental Sleep Luxury Collection Fully Assembled Split Box Spring for Mattress, King Fully assembled; the box spring is ready to use This box spring is good for all mattresses Strong & sturdy box spring Box spring comes split to easily pass through narrow hallways & doors Fast & easy shipping Made in USA Color May Vary Fully assembled; the box spring is ready to use This box spring is good for all mattresses Strong & sturdy box spring Box spring comes split to easily pass through narrow hallways & doors Fast & easy shipping Made in USA