A very popular component that allows you to turn a 10-frame hive into a 9-frame hive, or use the 7-frame spacers to turn an 8-frame hive into 7-frames.
The spacers evenly space the frames so the bees build “fat comb”. Also allows a little extra space to remove frames, making it easier for the beekeeper.
Sold individually, you need 2 per hive body.