6" Inch Aluminum Hose Flexible Air Duct Pipe for HVAC Flex Ductwork - 25' Feet Long Color_Aluminum Slots are angled to diversify

Slots are angled to diversify the airflow in 2 way direction

actual front end outer dimensions are 11

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

Looks like it was just waxed

+ Product Details Size – 10" X 4" is the size for the duct opening (floor/vent hole) measurement only

6" Inch Aluminum Hose Flexible Air Duct Pipe for HVAC Flex Ductwork - 25' Feet Long Color_Aluminum Slots are angled to diversify+ Product Details High Quality Aluminum housing on the outside and on the inside for the best insulation value 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 metallized polyester jacket tear and puncture resistant Carefully Shrink Wrapped With