Universal Covers U1320B58 Universal Chimney Cover with 5/8" Black Galvanized Steel Mesh, 13" x 20" Made in the USA 22-Gauge black powder coated galvanized Steel with California 5/8 inch mesh A universal chimney cover is a smart investment to protect homes against animals, leaves and debris Chimney caps act as a spark arrestor to prevent most ascending sparks from reaching the outside