Features: Effective for draft sealing: Effective as a magnetic fireplace draft stopper, this tape seals vent gaps to improve energy efficiency. It prevents warm air loss in winter, reduces humid air entry in summer, and dust debris intrusion. Convenient application and removal: The magnetic nature allows easy application and removal from steel surfaces without residue. Ideal for temporary setups, seasonal apply like a magnetic fireplace draft stopper, or adjustments. Specifications: Material: flexible magnet Color: black Size: 3 inches in diameter, 10 feet in length, 60 mil thickness Package includes: 1 Roll of double sided magnetic tape Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.