Purely Everyday Mailer Gummed Manilla Window C5++ 162X238MM 80GSM Box of 500

Amazon

Gummed flap for a long shelf life and reliable sealing High Quality 80gsm Manilla Paper Mailing wallets perfect for use on mailing and inserting machines Ideal for business correspondance, letters and other mail Window: 45 x 90 mm (60 up 20 left)

Zoro Tools

Catering for all sizes in wallet, pocket, gummed and self-seal envelopes. A range of paper grades available, all with excellent environmental credentials.