Prevue Pet beach branch perch is constructed of 100-percent natural, digestible ground calcium with real seashells. The natural branch with an uneven surface provides exercise as they walk and the shell pieces provide texture to help manicure beaks and nails. It includes following ingredients: calcium sulphate, calcium carbonate limestone grit, ground sea shell. Measures 7-inch length by 3/4 to 1-inch width. Comes in medium size. Available in blue, red, yellow assorted colors.