Postmaster DL Envelope 114x235mm Gummed 90gsm White (Pack of 500) F29151Made from bright 90gsm white paper, these Postmaster envelopes have been designed for, and tested on, all known makes of mailing machine, from desktop to full scale. They feature an oversized format for easier insertion of letters and a gummed flap designed for automatic sealing. These envelopes feature a plain white surface for adding a printed address. This pack contains 500 envelopes. Plain wallet envelopes for use in mailing machines Bright 90gsm