Lyson 10 Frame Polystyrene Inner Cover

Made for the Lyson 10 frame Polystyrene Hive.

It fits snugly inside the Outer Cover cavity to prevent the bees from building burr comb while still allowing the cover to be latched. It features seven round openings with removable plastic vent inserts and seven polystyrene discs that can be used to close the openings. This allows adjustable ventilation when needed and insulation when not.