Entrance reducers fit 10 Frame Langstroth hives and seamlessly integrate, with HLH bottom boards. Has a small and medium gap and can be used to completely close off your hive. Usage: Use to reduce the entrance of a hive during new package introduction, also used to prevent the hive from having too much cold air during winter. Can be used to close off hive for hive transport, or during area pesticide spraying. 1 per hive. | Harvest Lane Honey Hive Entrance Reducers