FORMAT: DL-110x220mm. It can contain an A4 sheet (21x29.7 cm) folded into 3. CHARACTERISTICS: envelope without window. Its background is printed in gray to ensure the confidentiality of your mail. CLOSURE: Easy Open, Self-Adhesive, the glue is protected by a siliconized strip, ensuring an effective and durable seal. PACKAGING: Loose in boxes of 500 with a hinged lid, facilitating the opening of the box. Suitable for mass mailings, mailshots, direct mail, etc. CLAIREFONTAINE PAPER 80g/m2: Guaranteed high whiteness. FSC certified to ensure sustainable forest management. Made in France in our factory in the heart of the Vosges.