This is the perfect entrance reducer for nucs, top bar hives, swarm boxes and queen boxex. The thumb slot enables you to easily turn to the desired entry of the 4 positions. Availalbe variations: 5" Steel with 1-3/4" hole, 5" Plastic with 1-5/8" & 2-3/4" Plastic with 15/16" hole.

Positions include:

1. Open

2. Queen excluder

3. Closed

4. Ventilated closed.