17" x 17" Model fits flue tile with outside dimensions of 16-1/2" x 16-1/2" to 18-1/2" x 18-1/2"
Stock sizes with flat gable lid; 8" screen height with 3/4" mesh bird/animal guard. Attaches to top of flue tile liner with 4 pressure screws included. Sizes apply to the OUTSIDE dimensions of the Clay-tile liner. Lifetime Warranty
