10 Frame Polystyrene VENTILATED Top Cover (does not include Mylar Inner Cover) [10PVT]

The ventilated polystyrene cover features four ventilation portals, each with a finger-set polystyrene block so that you can open as many of them (or none) as you wish. (Please note that, once removed, the blocks are loose and can go missing.) The cover itself has a depth of approximately 1 3/4", making it an ideal place for emergency winter feed (ie. sugar bricks, mountain camp method, winter patties, etc).