UNNI Extra Heavy-Duty Superior Strength Reclosable Plastic Zip Lock Zipper Storage Poly Bags, 8 Mil, Size: 3" X 5", Case of 50 Superior strength, puncture-resistant poly with heavy-duty zipper for security. Maximum protection for heavy industrial parts and sharp-edged materials.Archival quality, acid free for long-term storage.100% virgin polyethylene film. Size: 3 inch X 5 Inch ; QTY: Pack of 50 Bags [100 Sizes Available, From 1.25" x 1.25" up to 30" x 30"]; [2 Mil, 4 Mil, 6 Mil, 8 Mil Thickness Available] "Safety Warning: *These bags are not toys. To avoid injury or death, keep these bags away from babies and small children. Never allow children to use these bags without adult supervision. Not recommended for use in microwave ovens."