18x12x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 11.75) - 3 Pack Straight Register Boot just push open and push

just push open and push close

+ Product Details Size - 25"w X 18"h is the size for the duct opening measurement only

Say goodbye to vibrating louvers - this grille ensures a quiet

This 22" X 6" end cap is constructed with 26-gauge galvanized steel

18x12x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 11.75) - 3 Pack Straight Register Boot just push open and push+ Product Details 18" x 12" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17. 75" x 11. 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