Our C5 Kraft Envelopes are made with high quality 120gsm paper with a peel and seal adhesive to seal the envelope. These envelopes can be printed using a laser printer. Our C5 Kraft paper envelopes come in other size C5, C6, DL ,MINI 6.5 X 10cm & Small 8.5 x 11cm and come in packs of 75, 50 & 100. Our envelopes are cheap in price but not in quality or durability.