This Fireplace Venting Kit comes complete with either a 1 - 2" and 1 - 3" double ply aluminum liner-inlet with exhaust and a 2 - 3" to 2" reducer or a 2 - 3" double ply aluminum liner-inlet with exhaust. These options are available in either 20, 25 or 35 foot increments to ensure you have enough piping to vent your direct vent fireplace properly. A venting terminal is also included for your installation convenience.