Premium Static-proof Translucent Zip Lock Bags 8x9cm (3.1x3.5") (100/Pack) Colors (Front/Inside/Back): Translucent Gray/Translucent Gray/Translucent Gray Outer Size: 8x9cm (3.1x3.5"), Inner Size: 7x7cm (2.7x2.7") *Size may vary 1-2mm. Material: Anti-Static Mylar, Thickness: 3 MIL (8C) Can store up to 20g of powdered products