18x18x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 17.75) - 3 Pack Sheet Metal/Adjustable Elbow high-impact plastic to provide reliable

high-impact plastic to provide reliable and long-lasting protection for your thermostat

that will overlap at the wall joint

+ Product Details Size & Compatibilty - The 7" to 6" round metal pipe reducer & increaser 30 gauge is compatible with duct 7" to 6"

actual front end outer dimensions are approximately 27 5/8" width X 26 5/8" height

18x18x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 17.75) - 3 Pack Sheet Metal/Adjustable Elbow high-impact plastic to provide reliable+ Product Details 18" x 18" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17. 75" x 17. 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