4" Diameter - 90° Degree Adjustable Elbow - 4 PACK d Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 19 3/4" x 1"

making it an ideal present for holidays

+ Product Details Size – 18"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height -

actual front end outer dimensions are approximately 31 5/8" width X 24 5/8" height -

4" Diameter - 90° Degree Adjustable Elbow - 4 PACK d Actual Filter Size – 21+ 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