10" Diameter - 90° Degree Adjustable Elbow - 1 PACK w4h4 Actual Filter Size – 31

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

actual front end outer dimensions are 17" Width X 17" Height

+ Product Details Size – 18"w X 30"h is the size for the duct opening measurement only

+ Product Details Size – Duct end cap is 22" X 18" | 26-gauge galvanized steel end cap

actual front end outer dimensions are approximately 14 5/8" width X 22 5/8" height

10" Diameter - 90° Degree Adjustable Elbow - 1 PACK w4h4 Actual Filter Size – 31+ Product Details Size 10" round duct sheet metal elbow 26 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 2 Gauge thick & made of thick & durable galvanized sheet metal used for HVAC