Rectangular Duct End Cap | 30" X 12" End Cap Material_Aluminum + Product Details Size -

+ Product Details Size - 18"w X 36"h X 2"d (for duct opening measurement only)

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Easily reach in and grab what you need immediately

+ Product Details Size – 24" X 24" is the size for the drywall opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 18" duct openings

Rectangular Duct End Cap | 30" X 12" End Cap Material_Aluminum + Product Details Size -+ Product Details Size Duct end cap is 30" X 12" 26 gauge galvanized steel end cap, rectangular shape. Premium Quality Our rectangular duct cap is made of high quality galvanized sheet metal material (galvanized steel construction for durability and rust prevention). Made in the USA. Applications The product is used for stopping all types of fittings and also used to terminate a rectangular duct run in an HVAC application with a rectangular duct cap.