Rectangular Duct End Cap | 18" X 6" End Cap Compatible with Duct 4" + Product Details Size -

+ Product Details Size - 12"w X 14"h X 2"d (for duct opening measurement only)

Actual Filter Size – 15 3/4"w x 31 3/4" x 1"

With precise measurements and easy installation

Our filters stand as the safest choice to promote healthier living environments

actual front end outer dimensions are approximately 16 5/8" width X 12 5/8" height

Rectangular Duct End Cap | 18" X 6" End Cap Compatible with Duct 4" + Product Details Size -+ 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.