Tyvek B4 Gusset P/Seal Envelope Pk20

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 20mm gusset and extra strong hot melt peel and seal closure. These lightweight, flexible envelopes measure 343 x 250mm. This pack contains 20 white envelopes.