Tyvek B4 Pkt Gusset P/Seal Envelope P100

These Tyvek envelopes are made from 100% recyclable, high density polythene fibres (HDPE), which is tear and water resistant for extra security in transit. These envelopes have an expanding 38mm gusset and extra strong hot melt peel and seal closure. These lightweight, flexible B4 envelopes measure 353 x 250mm. This pack contains 100 white envelopes.