Duct Start Collar Take Off | 20" Sheet Metal Snap Together Start Collar is Compatible with 20" Duct 7" Diameter + Product Details 16" x

+ Product Details 16" x 30" x 1" replacement air filters for your furnace

in this case

+ Product Details Size – 24"w X 16"h is the size for the duct opening measurement only

UNRESTRICTED AIRFLOW For Your HVAC System - Noise Free Components - No Vibrating Louvers Etc

making installation straightforward and hassle-free

Duct Start Collar Take Off | 20" Sheet Metal Snap Together Start Collar is Compatible with 20" Duct 7" Diameter + Product Details 16" x+ Product Details Size Sheet metal duct board take off start collar is 20" and it is compatible with duct 20". Premium Quality Our products are made of high quality galvanized sheet metal with crimped ends (snap lock design) for easy fitting and secure connection. Made in the USA. Applications The snap collar duct board fitting is used as a main duct or plenum; a starting collar is installed for attaching a straight or split fitting for the ducts.