【100% Natural Material】Cuttlebone is derived from cuttlefish, definitely not made of cuttlebone powder ! No additives, no bleaching! So maybe have some black spots, no harm for pets birds. You can use it for birds with confidence! 【Good for Birds】The bird cuttlebone bulk contains calcium and other minerals that birds need to aid in bird bone formation and blood clotting, and promote overall bird health; The bird cuttlebone has a rough texture, ideal to help support beak strength. Birds can use cuttlebones to keep their beak in tip top shape. 【Proper Size】Each bird cuttlebone is approx. 3.9-4.5 inches/ 10-12 in length, approx. 1.4-1.57 inches/ 3.5-4cm width, and approx. 8-12g in weight; This cuttlebone for birds is ideal for small and medium birds; You can also break up the cuttlefish bone and put it in a bowl for the turtle or snail to use 【Ample Bird Cuttlebone】The package contains 6 pieces of cuttlebones for birds, ample quantity to meet your pet birds' daily needs and provide them with minerals.Please take note that the cuttle bone maybe broken during transportation.But please don't worry, any shreds are edible. 【Suitable for Most Birds and Reptiles】The cuttlebone for parakeet is suitable for cockatiels, canaries, parakeets, mynahs, parrots, lovebirds, toucans and other birds, and can also be applied for reptiles tortoise, turtles, snails and more.