2 Pack - 4" Diameter 90 Degree Adjustable Elbow - 30 Gauge Galvanized - Crimped End Connection Return Universal size

Universal size

actual front end outer dimensions are approximately 16 5/8" width X 22 5/8" height

Actual Filter Size – 17 3/4"w x 33 3/4" x 1"

+ Product Details Size – 4"w X 8"h or 8"w X 4"h is the size for the duct opening measurement only

} + Product Details Size & Compatibility - The size of a boot register end is 12" X 2

2 Pack - 4" Diameter 90 Degree Adjustable Elbow - 30 Gauge Galvanized - Crimped End Connection Return Universal size+ Product Details Size 4" 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