Perfect for homes , offices , and commercial establishments looking to improve heating efficiency Suitable for families , offices , and businesses that want to save on energy while maintaining a warm and comfortable atmosphere Keep your indoor space warm and comfortable with our Draft Stopper cold air and heat loss , ensuring a comfortable environment all winter long It will save a lots of electricity bill Our vent cover for the fireplaces has two side , 1 side is a mattes surface ( non-magnetic ) , and the other is a smooth surface ( ) You can aligns the surface with the fireplaces vent after the fireplaces is out and the fireplaces has cooled to room temperature Our fireplaces vent cover can effectively cold air from entering the fireplaces vent in winter , and also keep , pollens and critter out from entering rooms through the vent rubber , and resistant The easy installation design provides effective insulation and energy savings, Manufacturer: Watreketal