Chevron down icon Chevron down icon Zoom icon Click to expand Tap to zoom 10 Frame Entrance Reducer 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Sold out Spinner icon Sold out $3.10 | / The Entrance Reducer fits snugly in the opening between the bottom board and your first brood chamber to control the size of the entrance to the hive. 10 Frame Entrance Reducer - Not Treated 12 ⅜" x ¾" x ¾"