Gravel Paper 11 Inch Round. (11" Diameter) Gravel Paper for all caged birds comes in a package with 7 sheets. The Gravel helps to keep birds beaks and claws trimmed. The Paper is made with crushed sea shells for added calcium. Gravel sheets provide grit for hard-billed birds and aids in digestion. The Gravel Paper is safe, clean and sanitary. Cubes: 0.0009. Weight: 0.4300 lbs.