Each bag is made of a strong, stretchable, and lightweight mesh that is perfect for egg-hatching Bisphenol A (BPA) free Animal safe Made in the United States of America Returns may be subject to a 20% restocking fee Pinnon Hatch Farms Pedigree Egg Hatching Bags are made of a strong, stretchable, lightweight mesh perfect for pedigree egg hatching. Each bag holds up to a dozen eggs, allowing eggs to be separated by breed or breeding line during the hatching process. This is a simple, inexpensive solution for egg hatching. Close the open end of the bag with a knot. These extra stretchy bags ensure chicks have plenty of room while hatching. Returns may be subject to a 20% restocking fee.