MULTIPURPOSE Our magnetic fireplace draft stopper is practical. In winter it can keep unwanted cold air in your home and prevent heat loss; in summer it can be used to keep hot and humid air out ensuring that your chimney will not become unwanted cold air or a heat source of air. This product can also be applied to RV or other magnetic floors walls etc. WHAT YOU GET The package comes with 4pcs magnetic fireplace draft stopper that is 1016 x 101.6 x 1mm/40 x 4 x 0.04" (L*W*T) in size magnetic rubber material and black color.RELIABLE MATERIAL The magnetic fireplace draft stopper is made of magnetic rubber it has strong magnetism and can be fastened to the vent of your fireplace without slipping off.SPECIAL DESIGNED This magnetic fireplace draft stopper can be cutting to fit flexibly around your stove's vents.