Chimney Cap Size Fits Outside Flue Width of Fits Outside Flue Length of Screen Mesh Height
9"W x 9"L 7 1/2" - 9 1/2" 7 1/2" - 9 1/2" 8"
9"W x 13"L 7 1/2" - 9 1/2" 11 1/2" - 13 1/2" 8"
9"W x 18"L 7 1/2" - 9 1/4" 16 1/2" - 18 1/4" 8"
12"W x 16"L 10" x 12 1/4" 14" x 16 1/4" 8"
13"W x 13"L 11 1/2" - 13 1/2" 11 1/2" - 13 1/2" 8"
13"W x 18"L 11 1/2" - 13 1/4" 16 1/2" - 18 1/4" 8"
18"W x 18"L 16 1/2" x 18" 16 1/2" x 18" 8"