Budget Grade reversible bottom board has the traditional 3/4" entrance height on one side and 1/2" on the other. Made with tongue and groove cross pieces to help keep moisture out. Includes wooden entrance reducer for winter use or with a new hive. Made with Eastern White Pine our budget grade Bottom Board may have small knots, slight discoloration, or small blemishes. All wood is strong and solid and will give years of service. Ships unassembled 10 Frame dimensions -22" long x 16 1/4" wide x 2” tall 8 Frame dimensions -22" long x 13 3/4" wide x 2” high