This Aluminum Pipe can be used to vent most types of heating units including gas and electric clothes dryers. This product features an easy to close snap lock system. It’s composed of a non-combustible, all aluminum construction.4 in. of diameter x 24 in. LMade of 0.12 in. aluminumUsed for transition ducting, not for in wall useFor correct and approved installation practices always consult your local building codes