Envelopes
Blake Purely Everyday 229 x 102 mm 80 gsm Pocket Gummed Low Window Envelopes (9660W) Manilla - Pack of 1000
Gummed flap for a long shelf life and reliable sealing High quality 80 gsm paper Suitable for brochures, catalogues etc. Low Window Window 32 x 114 mm, 18 up, 32 left
https://www.bizrate.co.uk/envelopes/blake-purely-everyday-229-x-oid6685459925.html