4" Clinch Base Side Metal Takeoff 18" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 38 5/8" height -

+ Product Details Size – 12"w X 24"h pleated MERV 8 filter for HVAC return filter grille - 3 Pack

this 30-gauge stick-on collar is specifically sized at 24 inches

+ Product Details Size - 34"w X 20"h X 2"d (for duct opening measurement only)

4" Clinch Base Side Metal Takeoff 18" Round Duct Pipe actual front end outer dimensions+ Product Details Size & Compatibility The 4" clinch base side metal take off is compatible with duct 4" Superior Quality Made in the USA. Our clinch base side metal take off is made of high quality galvanized steel metal for durability and rust prevention. It has crimped ends for easy fitting and secure connection to consecutive duct joints Applications The Clinch base means its secured with clinching tabs. These tabs dig into the main duct when you