Blake Purely Everyday C4 324 x 229 mm 100 gsm Pocket Peel and Seal Window Envelopes (23892) White Pack of 250

Zoro Tools

ValueX Pocket Envelope C4 Peel and Seal Window 100gsm White (Pack 250) An extensive range of peel and seal envelopes that is a league above standard latex self seals. Its obvious advantage being the extended shelf life that comes with peel and seal and is becoming more and more popular due to this key feature.

Amazon

Secure Peel and Seal Closure for ease of use, added security and extra shelf life High quality 100 gsm paper Perfect for business correspondance, letters, brochures and more 40 x 105 mm window, 213 up, 24 left