* Customizable window size: window max size 90*120mm; envelope max size 153*290mm; 100g-200g wood free paper;

* Without window: envelope max size 210*330mm, 45g-250g wood free paper;

* Perforation line;

* Seal option: 1) Heat sealed 

                       2)Manual peel & seal on flap

* Ideal to contain RX lens, warranty card, delivery note, or marketing material

* Receiving address is visible through window, saving cost of printing/labeling on envelope

* Customizable print design on envelope for marketing message 

* Perforation line- convenient & time saving for end user

* Suitable for auto packing process