Rectangular Duct End Cap | 14" X 14" End Cap 4" Round Duct Pipe actual front end outer dimensions

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

Actual Filter Size – 33 3/4"w x 15 3/4" x 1"

But the benefits don't stop there

We use special materials To prevent corrosion

Rectangular Duct End Cap | 14" X 14" End Cap 4" Round Duct Pipe actual front end outer dimensions+ Product Details Size Duct end cap is 14" X 14" 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.