paper core for product roll insert. Paper core used for product roll.Material: kraft paper & cardboradPrinting: inside or outside surface print LOGO or solid color are available.Diameter Option: 1", 1.2", 1.25", 1.37", 1.5", 1.73", 2", 3" or as customer's sizeLength: any length less than 100cm.Thickness: 1 -- 12mmUsed for: paper industrial, fabric, adhesive tape, which need to roll the product.