We like simple equipment. And this is the most basic nuc box that we've encountered so far. Screened bottom and three ventilation holes on each end make this nuc box excellent for raising spring as well as late season nucs. This box features a migratory-style cover, a 1" round entrnace, three screened ventilation holes on each end and an integrated, screened floor. The cover can be screwed to the nuc box for save moving.