18" Diameter - 90° Degree Adjustable Elbow - 1 PACK 1-Way the actual front end outer

the actual front end outer dimensions are 10" in diameter

Actual Filter Size – 11 3/4"w x 13 3/4" x 1"

+ Product Details Size & Compatibility – The 8" stick-on Side take-off is compatible with duct 8"

actual front end outer dimensions are approximately 14 5/8" width X 24 5/8" height

18" Diameter - 90° Degree Adjustable Elbow - 1 PACK 1-Way the actual front end outer+ 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