Rectangular Duct End Cap | 30" X 12" End Cap Floor Grille Toe Space + Product Details Size -

+ Product Details Size - 25"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 30"w X 8"h pleated MERV 8 filter for HVAC return filter grille - 3 Pack

Universal Fit – Dimensions of 6-3/8" wide x 3-1/2" high x 3" deep make it compatible with most standard thermostat models

Actual Filter Size – 13 3/4"w x 29 3/4" x 1"

For 10" duct opening

Rectangular Duct End Cap | 30" X 12" End Cap Floor Grille Toe Space + Product Details Size -+ Product Details Size Duct end cap is 30" 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.