Double-sided black cardboard through the heart with a black cardboard SPEAKER

Double-sided black cardboard through the heart. Short-sided black cardboard, through the heart of black cardboard. Features: green dye, recyclable processing, pollution, both sides of the color without color, the middle part of the color is black sandwich, labeled waste after pulp produced by the United States, very high tensile strength, a molding 80-500g, more than 500g of can be mounted together black cardboard Uses: suitable for albums, frames, backplane, gift boxes, jewelry boxes, phone boxes, shoe boxes, stationery, clothing tag, notebooks, calendars, hand bags and horn speaker as well as electronic pads Crafts packaging.