18" X 18" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 19.75 X 19.75] Ceiling + Product Details Size - 4" Round Duct Pipe Product Details Size The SHEASC10W1-HP

+ Product Details Size - 22"w X 22"h X 2"d (for duct opening measurement only)

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

+ Product Description Introducing our 4" x 12" or 12" x 4" Floor Grille - a reliable and durable air grill designed for exceptional performance and built to last

will fit on a pipe that's 1/2" on the "outside" (OD)

This is an individual piece to customize your HVAC line set cover unit that can be used in both home and commercial settings

18" X 18" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 19.75 X 19.75] Ceiling + Product Details Size 4" Round Duct Pipe Product Details Size The SHEASC10W1 HP + Product Details Size 22"w X 22"h X 2"d (for duct opening measurement only) 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