3.25 In. X 10 In. X 3 Ft. Half Section Rectangular Stack Duct

3.25 In. X 10 In. X 5 Ft. Half Section Rectangular Stack Duct

3.25 In. X 14 In. X 5 Ft. Half Section Rectangular Stack Duct

3.25 In. X 14 In. X 3 Ft. Half Section Rectangular Stack Duct

2.25 In. X 12 In. X 2 Ft. Half Section Rectangular Stack Duct

3.25 In. X 10 In. X 5 Ft. Half Section Rectangular Stack Duct

3.25 In. X 14 In. X 5 Ft. Half Section Rectangular Stack Duct

4 In. X 5 Ft. Beaded Metal Duct Pipe