18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Powder Coated allowing you to choose the

allowing you to choose the best option to suit your airflow needs

Actual Filter Size – 33 3/4"w x 7 3/4" x 1"

+ Product Details Size - 20"w X 4"h is the size for the duct opening measurement only

Design – This duct fitting is designed for transitioning oval wall stack ducting to round sheet metal pipe

18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Powder Coated allowing you to choose the+ Product Details High Quality Aluminum housing on the outside and on the inside for the best insulation value Insulation A thick blanket of fiberglass insulation provides you with an R Value of 6. 0 Energy Efficient Air tight inner core decreases the pressure loss and provides a more hygienic environment high energy efficient No fiberglass erosion into air stream Design Designed to withstand bends and sharp turns without kinking. Tough reinforced