window envelope Material:80/100/120gsm kraft or white paper Size:DL, DLX, C4, C5, C6, DZ all size ... available4.Health environment protection, best quality and favorable price.Envelope, paper CD bag, red packet, kraft envelope as below:1) Size: ... as the common 4 colors (CMYK) process3) Material: white offset paper, kraft paper, special paper4) Finishes: Foil, Holographic, Emboss5) With Window, gummed ...