Sticky board grid for counting mite drop; mites drop and get stuck to the surface. The grid allows for easy counting to determine infestation levels.
The screen is placed over top of the Sticky Board to provide bees something to walk on rather than coming in direct contact with the sticky board. It is needed when using a standard bottom board, but is not necessary if you are using a fully closed screened bottom board.
While the Sticky Board is one-time use the Screen is re-usable.