Rectangular Duct End Cap | 22" X 12" End Cap flat stamped steel Actual Filter Size – 35

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

+ Product Details Size – 24" x 30" or 30" x 24" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 28 5/8" height

+ Product Details Size – The size of a galvanized sheet metal stack boot is 12" X 3

Actual Filter Size – 24 3/4"w x 25 3/4" x 1"

Rectangular Duct End Cap | 22" X 12" End Cap flat stamped steel Actual Filter Size – 35+ Product Details Size Duct end cap is 22" 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.