Rectangular Duct End Cap | 16" X 12" End Cap 1-Way + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 26" OR 26" x 36" duct opening (measured at the opening)

+ Product Details Size – 24" x 24" with 10" collar T-Bar drop ceiling perforated return grill - metal back casing

+ Product Details Size – 20"w X 10"h is the size for the duct opening measurement only

2/3" bar spacing - Horizontal bars are fixed at 45 degrees for Great Airflow Dynamics

Actual Filter Size – 27 3/4"w x 35 3/4" x 1"

Rectangular Duct End Cap | 16" X 12" End Cap 1-Way + Product Details Perfect Fit+ Product Details Size Duct end cap is 16" 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.