12x36x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 35.75) - 3 Pack 14" Round Duct Pipe you can quickly adjust airflow

you can quickly adjust airflow for year-round comfort

+ Product Details Size & Compatibility – The size of sheet metal pipe is 10" round x 20' long

compatible with 5" duct | 2 in a pack - 2' pipe – 4 foot length when connected – 30 gauge thick & made of thick & durable galvanized sheet metal

4" X 14" Is The Size For The Duct Opening Measurement Only

this guard ensures long-lasting protection and security

12x36x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 35.75) - 3 Pack 14" Round Duct Pipe you can quickly adjust airflow+ Product Details 12" x 36" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 11. 75" x 35. 75") A unique combination of cotton & synthetic fibers gives you the most filtration and the least air resistance equals great air & easy airflow for your system. The non pleated design provides low airflow resistance while still effectively capturing dirt and particles such as standing dust, spray paint