Round Stack Boot 12" X 3.25" X 7" round Compatible with 7" Duct w18h18 +Product Details Size – 3/8"

+Product Details Size – 3/8" x 50'

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 12" duct openings

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 24" OR 24" x 30" duct opening (measured at the opening)

A Uniquie Combination of Cotton & Synthetic Fibers Gives You The Most Filtration And The Least Air Resistance - Equals Great Air & Easy Airflow For Your System

Round Stack Boot 12" X 3.25" X 7" round Compatible with 7" Duct w18h18 +Product Details Size – 3/8"+ Product Details Size The size of a galvanized sheet metal stack boot is 12" X 3. 25" X 7". It is compatible with duct 7". Design The stack boot at the bottom of the stack allows a transition from an ordinary large round or rectangular duct to a thin wall mounted duct. Applications The straight boot is used for a straight line transition going from round pipe or insulated flex duct to wall stack. Premium Quality Our straight round stack boot is made