This Little Giant Solid Bottom Board is made of one piece 1 2" exterior plywood construction with tongue and groove white pine rails. Can be used as an alternative to screened bottom boards in your hive. Makes a durable， stable base for your hive. Can be used with all Little Giant 10-frame Hives. One-piece 1 2" exterior plywood construction with tongue-and-groove white pine rails Comes with plastic corrugated mite board Works with all Little Giant 10-frame Hives Wood Made in USA Your security is our number one concern