Envelopes
Blake Purely Everyday DL+ 114 x 235 mm 90 gsm Gummed Mailer Window Envelopes (3998LW) White - Pack of 1000
Gummed flap for a long shelf life and reliable sealing High quality 90 gsm paper Mailing wallets perfect for use on mailing and inserting machines Ideal for business correspondance, letters and other mail Window: 35 x 105 mm, 18 up, 20 left
https://www.bizrate.co.uk/envelopes/blake-purely-everyday-dl-114-oid22604130293.html