10-Frame This IPM (integrated pest management) bottom board comes complete with varroa monitoring screen. Access the screen from rear or front of the hive below the bottom board. Leave the screen out when not monitoring varroa levels to provide extra ventilation and allow mites to fall through to the ground.ASSEMBLED. Assists in controlling varroa mites and helps with hive ventilation. Includes: grid Corex debris board and entrance reducer. Remember to insert these items when installing a new package or re-queening to help unite the hive by enclosing the queen pheromone. Size Chart: Deep fits 9 1/8" frame fits 9 5/8" box size 8 3/8" and 81/2" x 16 3/8" Deep Deep Super Hive Body Brood Box Brood Nest WI Super fits 7 1/4" frame fits 7 5/8" box size 6 1/2" and 6 5/8" x 16 3/8" Uncommon Size 3/4 Super Wisconsin Super IL Super fits 6 1/4" frame fits 6 5/8" box size 5 1/2" and 5 5/8" x 16 3/8" Medium Super Illinois Super Modified Super Dadant Super Most common size for Honey Super Shallow Super fits 5 3/8" frame fits 5 11/16" box size 4 3/4" x 16 3/8" Shallow Super Often used for Cut Comb Quantity: One (1) Bottom Board Farm Pick Up cost: Free Farm Pick Up by Appt: Curbside | by Appointment | Thurs-Fri 11am-7pm and Sat 9am-12:30pm(In-Store Coming Soon) Pick Up at Gulf Coast Beekeeper Meetings | Charlotte, Collier or Lee: Free Charlotte: 1st SATURDAY of each month Collier: 2nd TUESDAY of each month Lee: 3rd TUESDAY of each month