I have been using the wooden reducers that are roughly 5/8 inch square and
have 3-4 different sized openings. These work fine but does anyone know of
a type of reducer that stays on the hive and can double to close a hive for
moving.

I think I read somewhere about one that was a sliding unit that stayed on
the hive. In one direction it reduced ot restricted and in the other was
open. Maybe I'm just dreaming.

Thanks in advance!!