18 x 12 Merv 2 HVAC Pleated Filter, 12-Pack Round Stack Boot + Product Details Size &

+ Product Details Size & Compatibilty - The 18" to 16" round metal pipe reducer & increaser 30 gauge is compatible with duct 18" to 16"

+ Product Description Enhance your HVAC system with our premium Aluminum Double Deflection Adjustable Air Supply Diffuser

Its precise dimensions ensure a perfect fit for your air duct openings

Upgrade your system with our high-quality galvanized steel round duct

Durability – Our Galvanized Duct Elbow is made of durable galvanized sheet metal with crimped ends for easy fitting and secure connection

18 x 12 Merv 2 HVAC Pleated Filter, 12-Pack Round Stack Boot + Product Details Size &+ 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