Purely Everyday Mailer Gummed Reverse Window White C5+ 162X238 100GSM Box of 500

Amazon

Gummed flap for a long shelf life and reliable sealing High quality 100 gsm paper Mailing wallets perfect for use on mailing and inserting machines Ideal for business correspondance, letters and other mail Reverse Window: 45 x 90 mm, 60 up, 20 left

Zoro Tools

Mailing wallets with an obvious difference. The front is all yours to print your message, without losing the cost saving advantages of machine insertion.