The Hambly Queen Dial helps you know when you should be doing different tasks and keeps track of where you are in the cycle. Invaluable for the beginner or experienced queen breeder. Sturdy write-on/wipe-off, plastic coated material can be used over and over again.Detailed information about timing for raising queens.Long lasting plastic material for long life durability.Be sure to check out the Hambly and Raising Honeybee Queens Combo offer, 393207362484