Advantages: Improved wintering – water vapour escapes easily through the floor – no need for top ventilation which wastes the colony’s heat. No need for extra screens when moving bees.Reduction of varroa populations – mites which fall through the screen do not climb back up. Easy monitoring of mite populations – simply slide in the plastic drawer under the screen when required. Can be left on all year round. Comes with our entrance block which doubles as a mouseguard for the winter months.