Clamp on Single Flue Cap 18" x 18"

Base O.D.: 19" x 19" 

Lid Size: 25" x 25" 

Fits Flue Size: 17" x 17" to 18 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

* Secure One-Screw Tightening