Keep your birdhouses in condition with these metal entrance guards. They are designed to avoid birds from chewing and damaging the entrance holes of their nests, ensuring and secure environment for breeding. These rings are easy to install and provide a Sturdy solution for maintaining the longevity of your birdhouses, making them an essential accessory for bird lovers. Features -Color:Silver -Material:Aluminium alloy -Size:15.00X15.00X0.50cm/5.89X5.89X0.20in -Sturdy design: crafted with Selected materials to ensure durability, making it a reliable addition to any bird breeding box -Chewproof ring: the chewproof ring design avoids parrots from damaging the entrance, maintaining the breeding integrity -Easy access: designed with a convenient entrance hole that allows birds to easily enter and exit, promoting a stressfree environment -Flexible integration: can be used in conjunction with other bird house accessories, offering a versatile and flexible breeding setup -Optimal breeding conditions: provides a secure and comfortable environment for bird breeding, ensuring the wellbeing of your birds Package list: 4 x nest box entrance rings 16 x screws