12x30x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 29.75) - 3 Pack Top Ceiling Box This 8" X 8" end

This 8" X 8" end cap is constructed with 26-gauge galvanized steel

+ Product Details Size - 48"W X 4"H is (for duct opening measurement only)

innerWidth > 749) { details

actual front end outer dimensions are approximately 10 5/8" width X 18 5/8" height

Thickest Vent Covers – Our magnetic vent covers are optimal at 1

12x30x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 11.75 x 29.75) - 3 Pack Top Ceiling Box This 8" X 8" end+ Product Details 12" x 30" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 11. 75" x 29. 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