One dozen medium hatching rings (patent pending). These are used to keep the egg’s air cells upright during incubation. They are two sided for various egg sizes. Just choose the side that fits your egg and insert pointy end into ring. These will fit bantam/kikiriki thorugh Turkey egg sizes. These are reusable and can easily be cleaned in soapy water. They are made of nontoxic PLA. However they are not dishwasher safe. There will be some surface flaws; however , the hatching rings will work as they were designed to.