Save 15% with this 2 in 1 package! Another sensible, plastic product from BeeSmart, this combo includes the Ultimate Hive Cover and Ultimate Bottom Board. Works only with 10 frame hives. Also has an added bonus of a Moving/Robbing Screen. The hive cover has a removable plug in the center which can be a place for the ultimate hive-top feeder. The bottom board comes with a plastic mite tray, stainless screen, entrance reducers/closures and a few other small features.