Review on 🔆 Versatile Blank Magnet Sheets: 24-Inches Wide, .30mil Flexible, Printable, DIY Craft Projects. Safe on Vehicles, Easy to Cut - 10 Ft. Roll. Made in America! by David Flores

Used to cover chimney openings when not in use. 'part of the cost of buying pre-cut black strips. It's easy to cut with household scissors and paint the white side with spray paint. (Reviews of pre-cut strips indicate they don't tint well with a black chimney) - The materials adhere very well to the chimney's metal surface and curl up so as not to interfere with starting a fire.