Made 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'. '.strtoupper('t')hey feature an oversized format for easier insertion of letters an... Made 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'. '.strtoupper('t')hey feature an oversized format for easier insertion of letters an... |