Master Flow | sku: 3570374 Master Flow 12 In. Air-Tite Take-Off The Master Flow Air-Tite 12 in. Take-Off is constructed of 30-gauge, galvanized steel for durability. This HVAC part is used to connect 12 in. round pipe or flexible duct to a flat surface. It features a tacky gasket to help create a secure,... Log in for pricing