HVAC Duct Start Collar Take Off | 12" Sheet Metal Snap Together Start Collar is Compatible with 12" Duct 3" Round Duct Pipe + Product Details Size -

+ Product Details Size - 18"w X 36"h X 2"d (for duct opening measurement only)

For MERV 2 filters

+ Product Details Size - 20"w X 16"h X 2"d (for duct opening measurement only)

With a 12-inch size

these airflow control components provide you with effortless control over your indoor environment

HVAC Duct Start Collar Take Off | 12" Sheet Metal Snap Together Start Collar is Compatible with 12" Duct 3" Round Duct Pipe + Product Details Size -+ Product Details Size Sheet metal duct board take off start collar is 12" and it is compatible with duct 12". 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.