Rectangular Duct End Cap | 10" X 10" End Cap Return R6 Fiberglass Back Plenum accepts

R6 Fiberglass Back Plenum accepts 6" to 18" Round Spin-in Collars or Start Collars (not included) - Accepts 1" disposable filter (not included) - Recommended Size: 20" x 20" x 1"

our damper is designed to perfectly align with your setup

and lay it flat in the grid

85" width X 21

Rectangular Duct End Cap | 10" X 10" End Cap Return R6 Fiberglass Back Plenum accepts+ Product Details Size Duct end cap is 10" X 10" 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.