For lunchbox dividers. Cannot be used in a microwave. Value Pack of 100 Size:6x6x2.3cm Product Weight: Approx. 0.02 g Material: Aluminum Peel Country of Origin: China Item Weight 11.66 pounds Manufacturer 東洋アルミエコープロダクツ Package Dimensions 15.75 x 12.8 x 9.45 inches