12" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Sheet Metal/Adjustable Elbow actual front end outer dimensions

actual front end outer dimensions are 13" width X 13" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 12" or 12" x 6" duct opening (measured at the opening)

For MERV 2 filters

+ Product Details Size – Size - Cuts 45mm & below

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 10" duct openings

12" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length Sheet Metal/Adjustable Elbow actual front end outer dimensions+ 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