HVAC Duct Start Collar Take Off | 18" Sheet Metal Snap Together Start Collar is Compatible with 18" Duct 10" Diameter + Product Details Size -

+ Product Details Size - 18"w X 14"h X 2"d (for duct opening measurement only)

+ Product Details Size - 12"w X 4"h Is The Size For The Duct Opening Measurement Only

actual front end outer dimensions are approximately 24 5/8" width X 30 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 25" OR 25" X 16" duct opening (measured at the opening)

Actual Filter Size – 9 3/4"w x 21 3/4" x 1"

HVAC Duct Start Collar Take Off | 18" Sheet Metal Snap Together Start Collar is Compatible with 18" Duct 10" Diameter + Product Details Size -+ Product Details Size Sheet metal duct board take off start collar is 18" and it is compatible with duct 18". Premium Quality Our products are made of high quality galvanized sheet metal with crimped ends (snap lock design) for easy fitting and secure connection. Made in the USA. Applications The snap collar duct board fitting is used as a main duct or plenum; a starting collar is installed for attaching a straight or split fitting for the ducts.