A crown board with 2 holes and supplied with two porter bee escapes. A good insulation for your hive when placed above the super and below the roof. Also when feedling your bees, a rapid feeder can be placed over one of the holes.
A Rhombus board supplied with rhombus escape. This board can be used for a rapid clearing of your bees usually clear within 1-2 hours.
The frame has 8mm spacing one side and 18 mm the other to give easy clearing space