ATCOFLEX

Metal flexible ducts, sheet metal pipe collars, and metal register boxes, all of the foregoing primarily used for heating and ventilation use in residential and commercial buildings, and not including marine, automotive, and appliance usage

Sheet metal heat diffusion collars and air diffusers, all of the foregoing primarily for primarily for heating and ventilation use in residential and commercial buildings, and not including automotive, marine, and appliance usage

Non-metal flexible ducts and non-metal register boxes, all of the foregoing primarily for heating and ventilation use in residential and commercial buildings, and not including marine, automotive, and appliance usage