Envelopes
1000 Mail Lite Gold A/000 Padded Bubble Envelope (110mm x 160mm or 4.3" x 6.3")
1000 Gold Mail lite A/000 (110x160mm) Envelopes Lined with air cap barrier which is specially sealed for extra protection Manufactured from thick quality kraft paper Commonly used for economical simple packaging and posting
https://www.bizrate.co.uk/envelopes/1000-mail-lite-gold-a-000-oid6615964996.html