A New Hair Graft Canister For Graft-Counting And Preserving in Damp Medium Micrografts. slit grafts and mini grafts are used in hair transplantation. After preparing them, grafts are preserved in a damp medium until transplantation. It is necessary to know the number of the grafts because as many recipient areas (holes) as the grafts are to be prepared. In this study, a new model of the hair graft canister is introduced.