Rectangular Duct End Cap | 20" X 6" End Cap with filter plus { display: inline-block

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25" Plenum Size 20x20 Filter Size to be used: 20x20x1

actual front end outer dimensions are approximately 20 5/8" width X 18 5/8" height

This versatile diffuser is adaptable to various airflow needs

actual front end outer dimensions are approximately 22 5/8" width X 8 5/8" height

Rectangular Duct End Cap | 20" X 6" End Cap with filter plus { display: inline-block+ Product Details Size Duct end cap is 20" 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.