6 x 9" White Flat Tyvek Envelopes. Tyvek envelopes provide superior puncture, tear and moisture protection. Constructed from 14 lb. olefin. Ten times stronger than paper envelopes. Feature self-seal closure. Available in plain, First Class and Air...
6 x 9" White Flat Tyvek Envelopes. Tyvek envelopes provide superior puncture, tear and moisture protection. Constructed from 14 lb. olefin. Ten times stronger than paper envelopes. Feature self-seal closure. Available in plain, First Class and Air...
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