VWR International 89107-732 VWR* Aluminum Foil Hd 18Inx50Ft Premium Ultra-Clean* Pure Aluminum Foil . Heavy Duty. Can Withstand Extreme Heat And Cold And Has The Lowest Moisture-Vapor Transfer Rate Of All Wrapping Materials. Metal Tear-Off Bar For Ease In Achieving The Exact Size Needed. 18 In X 50 Feet.