JAM Paper Tyvek Envelopes, 9 x 12 Open End, White Airmail, 250 Pack VariesBy:envelope_colour_17838:Assorted|envelope_size_8174:9" x 12"|envelope_pack_size_1000101:250 Pack Each envelope measures 4 3/4"

Each envelope measures 4 3/4" x 11" to accommodate to letters

Their jet black color completes their sophisticated and elegant appearance

Sans acide ni lignine

Scellez vos enveloppes à l’aide de la fermeture gommée

ces enveloppes sont idéales pour les petits documents

JAM Paper Tyvek Envelopes, 9 x 12 Open End, White Airmail, 250 Pack VariesBy:envelope_colour_17838:Assorted|envelope_size_8174:9" x 12"|envelope_pack_size_1000101:250 Pack Each envelope measures 4 3/4"JAM Paper Heavy Duty Tyvek Envelopes are some of the strongest and sturdiest envelopes available. Tyvek is a registered trademark of DuPont, the established chemical company responsible for developing this durable polymer. Tyvek is composed of high density polyethylene fibers, a synthetic material that is extremely hard to rip and tear. This type of material is the same used to build and insulate houses, so you can be assured the materials inside