1100 Aluminum Foil (O) .003" Thick x 48" Wide x 100 Feet Long Roll Thickness Tolerance: +/- 10%. Length Tolerance + 5 feet. Width and length tolerances for ±1/16". Yield Strength: 2,500 PSI Hardness 23 Brinell Temper Softened (O) Temperature range -20 to 300F Non Magnetic, Non Heat Treatable Grade 1100 is 99% Aluminum content. It offers superior corrosion resistance, weldability, formability and conductivity. RETURN'S Where we are at fault. Item not as described, damaged or an obvious error on our part is guaranteed a full refund, inclusive of any & all shippingper our stated directions. RETURN DIRECTION’s; All returns MUST be in the original condition received. All returns MUST be shipped in the same manner as we shipped originally. ANY ADDITIONAL COST UP & BEYOND THE ORIGINAL COST, INCURRED IN RETURNING YOUR ITEM IS NOT REFUNDABLE. (if you choose to return an item at a higher rate than we originally shipped to you? This portion is NOT refundable) Refunds due because of a no error on our part are completed asan item refund only. Shipping is excluded. PLEASE feel free to contact us with any questions or concerns, as we strive for 100% satisfaction & happy customers. Items with a free shipping 20% restocking fee will apply.