Penn Plax 5 Inch -Twin Cuttlebone Pack For Birds Comes With Two Cuttle Bones That Measures 2.75"L X 4.5"H Making It A Great Treat In Any Cage, Plus It Comes With A Holder For Even Easier Access. Conditions And Trims The Beak Of Your Pet Bird. Features A Holder That Clips Onto Any Type Of Wirder Bird Cage Securely.