A pair of entrance reducers similar to the version used on our hives. Used inverted, to close off the entrance completely or normal, to restrict to a bee sized gap. 

A pair of entrance reducers similar to the version used on our hives. Used inverted, they close off the entrance completely but in normal use they reduce the entrance to a bee space high which keeps out mice and helps the bees defend a smaller entrance. They are sold as a pair as our nuc boxes have two entrances as standard.