Envelopes
Tyvek C5 Envelope 229x162mm Pocket Peel and Seal White (Pack of 100) 551024
Security 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: C5 (229 x 162mm) Supplied in a pack of 100
https://www.bizrate.co.uk/envelopes/tyvek-c5-envelope-229x162mm-pocket-oid36812008838.html