18" Diameter - 90° Degree Adjustable Elbow - 1 PACK Fixed Blades with Damper It is compatible with duct

It is compatible with duct 6"

Actual Filter Size – 7 3/4"w x 31 3/4" x 1"

+ Product Description Brazing is a metal joining process utilizing a filler metal that melts above 840 Degrees F and below the melting point of the base metals

Follow the manual’s instructions for cleaning the internal components if required

the actual front end outer dimensions are 8" in diameter

18" Diameter - 90° Degree Adjustable Elbow - 1 PACK Fixed Blades with Damper It is compatible with duct+ Product Details Size 18" round duct sheet metal elbow 30 gauge galvanized crimped end connection adjustable from 5 90 Premium Quality Made of galvanized metal to prevent corrosion, oxidation & rust from water & moisture that lasts longer requiring less maintenance Save money with this energy efficient material, maximizes airrflow and reduces fire hazards. Applications 30 Gauge thick & made of thick & durable galvanized sheet metal used for HVAC