The Master Flow 8 in. to 6 in. x 6 in. Wye is made of 30-Gauge, galvanized steel. It is designed to transition from 1 pipe to 2 pipes for heating and air conditioning applications. The wye is easily installed with sheet metal screws not included. It has a maximum temperature rating of 390°F.30-Gauge, galvanized steel constructionDesigned to transition from 1-pipe to 2-pipes in heating and air conditioning applicationsEasily installed with sheet metal screws not includedMaximum temperature rating of 390 degrees FahrenheitAlways insulate ductwork for greater system efficiency and comfortSeal seams with code-approved mastic, sealant or duct tape not included