About Master Flow™ Rectangular Stack Duct Starting Collar

This Master Flow™ 3-1/4 in. x 10 in. Rectangular Stack Duct Starting Collar is made of durable, galvanized steel. It is used to transition from plenums (duct board or lined) or a flat surface to 3.25 in. x 10 in. stack duct. It installs easily with sheet-metal screws.

Features & Benefits

Product availability is subject to change without notice. Not all products are available from all facilities.

Product Documentation

View All Documents