Our J-NUC is made of white pine, with a top made of 3/4" MDO plywood dadoed around all four sides to keep from sliding off, and a standard feedhole. The bottom is screened for full ventilation and pine blocks are attached to the bottom for stacking and to still allow for air circulation. All joints are stapled and a small wedge is added to seal the entrance and serves as an entrance reducer. This box has 7/8" rabbites instead of standard box to allow for dadoed top and queen cell or patties. The boxes holds 5 standard deep frames(not included) and are dipped in a Copper Greenwise and are ready to use. All our boxes are made here in the USA.