Envelopes
Tyvek B4A Envelope 330x250x38mm Gusset Peel and Seal White - 11842
Gusset envelope designed to be water and tear resistant. Made of 100% high density polyethylene fibres (HDPE). Extra strong hot melt peel and seal closure. Size: B4A (330 x 250 x 38mm). Colour: white. Pack of 100.
https://www.bizrate.co.uk/envelopes/tyvek-b4a-envelope-330x250x38mm-gusset-oid32424080702.html