8" Diameter - 90° Degree Adjustable Elbow - 4 PACK Copper Coil and the Tank Cover is

and the Tank Cover is also made of High Quality Flame Retardant Metal

+ Product Details Size - 8"w X 16"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 8 5/8" height -

These are specially sized to fit into all drop ceiling's

+ Product Details Size – Sheet metal duct board take off start collar is 12" and it is compatible with duct 12"

8" Diameter - 90° Degree Adjustable Elbow - 4 PACK Copper Coil and the Tank Cover is+ Product Details Size 8" 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