The inner cover a layer of protection between the brood box and the telescopic top. By placing brood box on top and a feed over the hold it also provides protection for your liquid feed from the sun and bugs.
Research has shown that using a screened bottom board is a good way to control the mite count in a hive because of the number of mites that fall through the bottom screen during their everyday normal active. The screened bottom also allows proper ventilation causing the bees to work less and reducing swarming. Our Screen Bottom Board 45 degree slanted front landing board integrated with the bottom board, slide out board to observe mite count; solid constructed sides are built for long term use.