Check the listing for details. Rectangle FlueBlocker Chimney Draft Stopper, Wool Chimney Sheep. Color: Gray, Condition: Used. Listed at 6.50 USD. These FlueBlockers are refurbished and function just as a brand new FlueBlocker would. The only difference is they may have some smudges or stains that we could not remove during the refurbishing process. These units are from customers that ordered the incorrect size and then exchanged them for the correct size. The FlueBlocker is a draft stopper plug to use to stop drafts in chimney flues or dampers.There is a flow chart in the pictures to help you determine which size is best for your application. Check it out!The FlueBlocker works by pressure fitting into the opening to seal the area and hold itself in place. For this reason always order a FlueBlocker that is slightly larger than the area it is going into. You can always trim for the best fit, or make a small slit to allow for hardware that is not removable.If you need help measuring please contact us through our seller messages and we can walk you through getting the correct size. If you need additional handle extenders to be able to reach your install location they can be purchased separately. There is a chart explaining how they work so you can determine how many your install requires.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 to remove it before starting a fire.STOP DRAFTS AND ODORS - The Square and Rectangle Chimney Flueblocker pressure fits into a square or rectangle flue opening. It can be trimmed with scissors to accommodate sizing and hardware.IMPORTANT - The Flueblocker cannot be used with an active vented gas log set. For safety, a vented gas log would need to be disabled or removed in order to use the Flueblocker. MULTIPLE BENEFITS - The seal it creates stops DRAFTS, ODORS, NOISE, and DEBRIS from coming into your home through the fireplace. Using a Flueblocker can pay for itself in one heating season, making your home will feel warmer by keeping warm air in and cold drafts out. EASY INSTALLATION & REMOVAL – No more fussing with an ineffective balloon, pillow or fabric fireplace covers – Simply insert the draft stopper into your fireplace flue just above the firebox. The Flueblocker is easily removed when you are ready to use your fireplace. NATURALLY RENEWABLE & HIGH QUALITY – The Flueblocker is made out of naturally renewable, dense, durable, and rigid 100% Herdwick Wool imported from England. These attributes allow it to stay in place without puncturing or deflating.