100 New Flat Black Aluminum Mylar Foil Zip Lock Bags Pouch 12x18cm (4.7x7") Colors (Front/Inside/Back): Black/Silver/Black Outer Size: 12x18cm (4.7x7"), Inner Size: 10.5x14cm (4.1x5.5") *Size may vary 2-3mm. Material: Metallic Mylar, Thickness: 3 MIL (8C) Can store up to 170g of powdered products