HVAC Duct Start Collar Take Off | 18" Sheet Metal Snap Together Start Collar is Compatible with 18" Duct sidewall Crafted from robust 1680D ballistic

Crafted from robust 1680D ballistic nylon and equipped with 5 strong magnets

Actual Filter Size – 21 3/4"w x 23 3/4" x 1"

including inclement weather

actual front end outer dimensions are approximately 16 5/8" width X 24 5/8" height

Designed for both walls and ceilings

HVAC Duct Start Collar Take Off | 18" Sheet Metal Snap Together Start Collar is Compatible with 18" Duct sidewall Crafted from robust 1680D ballistic+ 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.