Fireplace draft stopper (large plug - fits most masonry fireplaces with dampers up to 38x16");

The Large Fireplace Plug is an inflatable urethane plug measuring 38" x 16". It is quickly and easily installed in the fireplace just below the damper level. The Fireplace Plug can be adapted to work in almost all fireplaces. Even if you have an unusual construction, the Fireplace Plug can be successfully installed in less than 2 minutes. The Fireplace Plug is provided with 5 "slittable" areas that can be cut to provide an opening for a damper handle. As the Plug is inflated it seals around the damper handle sealing the opening!