Chimney Cap Size	Fits Outside Flue Width of	Fits Outside Flue Length of	Screen Mesh Height
8" x 8"	6" - 8 1/2"	6" - 8 1/2"	8"
8" x 13"	6" - 8 1/2"	11 1/2" - 14'	8"
8" x 17"	6 1/4" - 8 1/2"	16 1/2" - 19'	8"
9" x 22"	6 1/4" - 8 1/2"	19" - 21 1/2"	8"
9" x 28"	6 1/4" - 8 1/2"	25" - 27 1/4"	8"
12" x 12"	10" - 12 1/2"	10 1/2 - 13	8"
12" x 16"	10 1/2" - 13"	14 1/2" - 17"	8"
13" x 13"	11" - 13 1/2	11 1/2" - 14"	8"
13" x 17"	11" - 13 1/2"	16 1/2" - 19"	8"
15" x 15"	14" - 16 1/2"	14 1/2" - 17"	8"
17" x 17"	16" - 18 1/2"	16 1/2" - 19"	8"