Blake Purely Everyday DL+ 111 x 232 mm 90 gsm Gummed Mailer Window Envelopes (3705) White Pack of 1000

Amazon

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: 39 x 93 mm, 20 up, 20 left

Zoro Tools

The most extensive range of mailing wallets available from stock in the world! Sizes that are unique to Blake and window positions that cater for every address permutation justify our bold statement.