Fume Boards are made to be used with an agent like Bee-Quick to remove bees from the supers in order to harvest honey. It is 1-3/8" deep-sided box with a metal lid and an open bottom. Cloth is under the metal. Spray the agent on the cloth. Place on top of the top super. The bees will leave in 6-7 minutes. Made for a 10-frame super.