BZPEN-Queen Marking Pen - Red, White or YellowCutler Supply
BZPEN This colorfast ink queen marking pen is used for indicating the year a queen is introduced to a hive. Marking a queen with a queen marking pen helps you to locate her so that you can safely transfer resources to other hives. You can also confirm that she has not been replaced.
International Colors for marking Queen Bees.
White years ending with 1 or 6
Yellow years ending with 2 or 7
Red years ending with 3 or 8