or if you use mediums only: http://www.brushymountainbeefarm.com/Medium-Queen-Castle/productinfo/736/
I don't think you'll ever be sorry you did. This is not a shameless promotion for brushy mountain, I don't even work for them, I'm just a hobbyist beekeeper with only 3 years under my belt. But the queencastle is awesome to have in your arsenal of tools because you can pull frames with swarm cells on them, put one frame with cells into each QC compartment, and put a 2nd frame of honey/pollen into the same compartment, come back 3 weeks later and, voila, you've got a new queen in there! What gadget could be better than that?
Don't like Brushy? Fine, Walter Kelly has the same thing:
A forum community dedicated to beekeeping, bee owners and enthusiasts. Come join the discussion about breeding, honey production, health, behavior, hives, housing, adopting, care, classifieds, and more!