Rectangular Duct End Cap | 18" X 6" End Cap Compatible with Duct 4" Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 8" X 4" duct openings

C (Common): Black

Cubic core eggcrate design has the highest rate of airflow efficiency

Applications – Suitable for cutting plastic

Rectangular Duct End Cap | 18" X 6" End Cap Compatible with Duct 4" Ideal for Walls & Ceilings:+ Product Details Size Duct end cap is 18" X 6" 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.