Bolt on Stainless Single Flue Cap 13" x 18"

Base O.D: 14" x 19" 

Lid Size: 20" x 25" 

Fits Flue Size: 12" x 17" to 13 1/2" x 18 1/2" 

Features:

* Targeted Protection for Flues 

* 8" Screen Height 

* Adjusts To Fit 2 1/2" of Flue Deviation 

* 3/4" Mesh