12 x 12 Merv 2 HVAC Pleated Filter, 12-Pack Return Grille + Product Details Size -

+ Product Details Size - 6"w X 28"h is the size for the duct opening measurement only

this access door is built to last and never rust

+ Product Details Size & Compatibilty - The 18" to 14" round metal pipe reducer & increaser 30 gauge is compatible with duct 18" to 14"

+ Product Details Size - 30"w X 36"h X 2"d (for duct opening measurement only)

12 x 12 Merv 2 HVAC Pleated Filter, 12-Pack Return Grille + Product Details Size -+ Product Details Size 12"w X 12"h pleated MERV 2 filter for HVAC return filter grille 12 Pack. Actual dimensions: 11. 75" X 11. 75" High Quality A uniquie combination of cotton & synthetic fibers gives you the most filtration and the least air resistance equals great air & easy airflow for your system Design The W shaped pleats increase the surface area, effectively capturing dirt and particles such as pollen, dust mites, standing dust, spray paint