Using a clearer board is one of the method to clear bees from a hive box to be harvested. Regardless of the method being used, be sure that the box being harvested is free of brood and the queen, in the unlikely event of her being in the top box, has been smoked down into the box below. Western red cedar & stainless steel screws. An 8-way bee escape, with 7 mm final openings, is mounted inside. Fully assembled and ready to use! 300 mm X 300 mm inside dimensions - 376 mm X 376 mm outside dime