The Assembled Bottom Board is the foundation to your hive. It provides the entrance to your hive and gives the bees proper space to work. Our Bottom Board is constructed with ¾" (1.91 cm) plywood that is stapled and glued together to give you years of service. Painted for your convenience. All bottom boards include an entrance reducer. Reversible.Compatible with 10 Frame equipment only.For additional quantities, see our related products.