5" Diameter - 90° Degree Adjustable Elbow - 4 PACK Material_Aluminum + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening)

+ Product Details Size – 18" x 22" or 22" x 18" is the size for the duct opening measurement only

SEE BELOW IN DESCRIPTION HOW TO MEASURE A FLOOR REGISTER

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5" Diameter - 90° Degree Adjustable Elbow - 4 PACK Material_Aluminum + Product Details Perfect Fit+ Product Details Size 5" 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