Component:Plastic,Size: app.15x13x10cm/5.91x5.12x3.94in The internal is designed to close the for in the appliance,and can be fastened for single. It adopts a screwless structure,and use,and does not damage the body of the for. The button adopts a split structure and will not break after many times of use. Features: Multipurpose Pigeons Holder,for Special Fixer,Sturdy Bird Fixed Cage,Pet Birds Grooming Supplies.