18 x 12 Merv 2 HVAC Pleated Filter, 12-Pack Sheet Metal/Adjustable Elbow this robust access door ensures

this robust access door ensures security with its tumbler lock mechanism

This 20" X 6" end cap is constructed with 26-gauge galvanized steel

+ Product Details Size – 6"w X 14"h is the size for the duct opening measurement only

Suitable for High Wall Split Systems

18 x 12 Merv 2 HVAC Pleated Filter, 12-Pack Sheet Metal/Adjustable Elbow this robust access door ensures+ Product Details Size 18"w X 12"h pleated MERV 2 filter for HVAC return filter grille 12 Pack. Actual dimensions: 17. 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