And if there is damper hardware in the way you can put a slit in the Flueblocker pad to accommodate it. Do NOT light a fire with the Flueblocker in place. Do NOT use the Flueblocker in a fireplace that has a vented gas log. Make sure the red reminder tag hangs into your firebox to remind you it is there. The item "Rectangle Flueblocker Chimney Draft Stopper, Wool Chimney Sheep" is in sale since Thursday, May 26, 2016.This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Fireplaces & Stoves\Replacement Parts". The seller is "chimneyballoonusa" and is located in Mauldin, South Carolina. This item can be shipped to North, South, or Latin America, all countries in continental Asia, Australia, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South africa, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, New Zealand, Switzerland, Norway, Ukraine, Croatia.