This product contains 100/200 pieces of queen rearing cups which you can use for a long time. They are used for laying eggs to raise queens. And the cell cup is made of high quality plastic material and it is non-toxic, so it will do no harm to your bees. Besides, it is very easy for you to use it, you just need to put the cups at the bottom of your hive frame. Specifications: Material: Plastic Color: Size: 10×19mm/0.06"×0.07" Quantity: 100pcs/200pcs Package Includes: 100/200×Cell Cups(Queen rearing box is not included)