Reliable shipping of documents. Nowadays, mailing letters is no longer essential for offices. Many tasks can be accomplished remotely using technologies like computers. However, sometimes certified papers need to be sent with a seal, and it is important to handle this matter responsibly. That’s why you should keep a small pack of 10 Elco Office C4 envelopes from a Swiss manufacturer in your desk drawer. The dimensions of these envelopes are perfect for sending A4 sheets, ensuring that all documents arrive intact to the recipients. This is guaranteed not only by the size of the envelope but also by a strong paper that won’t tear during shipping. It’s clear that a mediocre product with poor design is not the best choice.