Astria Black Round Top with Mesh Screen RT-8DM-KAstria Black Round Top with Mesh Screen RT 8DM K Product Details What is the purpose of the Astria Black Round Top with Mesh Screen, and how does it help protect a chimney system from debris and animals while ensuring adequate ventilation? The Astria Black Round Top with Mesh Screen is designed to protect a chimney system by preventing debris, birds, and small animals from entering the flue while allowing for adequate ventilation. The mesh screen acts