Kraft Paper Envelope Packaging Size is Custom size. Material of Mail Box are 140gsm woodfree paper, 140gsm kraft paper and 250gsm kraft paper, Kraft Box printing is black printing or CMYK printing. Envelope Packaging Box Finishing is glued. Paper Box Packaging Design can be printed your own design. Printing your own design is warmly welcome. We are able to provide free template, free samples for you. Looking forward to working with you. Plz send us inquiry with details. Envelope Packaging Box,Kraft Box,Mail Box,Kraft Paper Envelope Packaging Fushan Color Print Co., Ltd , https://www.jsfushanprinting.com