Mann Lake DC680 Sticky Board with Screen This sticky board can be used with or without the screen to monitor or diagnose a varroa infestation If placed directly on the bottom board, the screen will be needed to keep the bees from the adhesive When used in conjunction with a screened bottom board, the replacement sticky board can be used alone The sticky board is conveniently printed with the grid lines to aid in determining the number of mites present Measures 17-1/8-inch length by 12-3/8-inch width by 1/8-inch height