Business Mail flat envelopes B5 18x25cm HK white (500 pieces)Flat envelopes with strip B5 176x250mm 500 pieces An envelope with a self sealing strip is a reliable solution for storing and mailing documents, letters or advertising materials. Thanks to the self adhesive strip, closing the envelope is fast, convenient and hygienic just remove the protective tape and press the flap. This is an ideal option for companies, offices, accounting offices or individuals who value time savings and the aesthetic appearance