18" Diameter - 90° Degree Adjustable Elbow - 1 PACK 1-Way This energy-efficient material maximizes airflow

This energy-efficient material maximizes airflow and minimizes fire hazards

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

+ Product Details Size – 30"w X 20"h is the size for the duct opening measurement only

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

the actual front end outer dimensions are 10" in diameter

18" Diameter - 90° Degree Adjustable Elbow - 1 PACK 1-Way This energy-efficient material maximizes airflow+ 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