The New Guardian C4 Internal Mail Envelope with pre-printed address boxes is the best choice for convenient internal mailings.
Store and mail all important documents using this envelope. It features pre-printed fifty address boxes for internal mailings. Available in a standard C4 size, this envelope can easily hold your official papers. Its tuck-in flap closure allows you to secure your items to prevent them from slipping out. It has punched holes to indicate the contents of the envelope. The envelope is made of 130gsm paper for durability.