DuraVent 1705 7DBK-DS Dura Black 7" Damper. DuraVent is a leader in the venting industry. DuraVent has a large line up of venting products and continues to design safe and efficient venting part and products. This DuraVent 1705 7DBK-DS Dura Black 7" Damper is ideal for wood stoves and wood burning fireplaces. This Damper is durable enough for 400-degree Fahrenheit maximum operating temperatures.