Queen split box spring only. The term nuc refers to a split or small colony that does not yet fill a standard 10 frame or 8 frame brood chamber. Nucs generally are designated as 1 frame 2 frame etc with 3 frame being the minimum viable size if the temperatures are expected to approach freezing. The cardboard eventually sagged leaving a wooden t supporting our whole mattress. She treated me as well as any other customers would be treated although i was only in need of a box spring.
The associate that assisted me in the purchase of this box spring was excellent. My old box spring was cardboard over wood.