This queen-rearing kit system eliminates the process of grafting by having the queen lay directly in the cell cup. This system allows you to raise many queens (up to 110) at one time. All components of this complete kit are reusable except brown cell cups. During queen rearing, reusing cell cups greatly diminishes the acceptance rate. We recommend successful queen rearing be done with new cell cups every time.Sold as a kit, no substitutions.