ELCO Couvert Sycling C4, 250 grey self-sealing envelopes without window, Blue Angel certified, ideal for secure A4 document mailing in office and business correspondence.
The ELCO Couvert Sycling C4 is a grey paper envelope without a window, designed for everyday office mailing needs. The set of 250 pieces provides a reliable, cost-effective solution for sending standard A4 documents securely.
250 grey C4 envelopes with no window for clean, professional presentation
Blue Angel certified paper — environmentally responsible choice for routine correspondence
Sycling (self-sealing) closure ensures a secure, tamper-evident seal without additional adhesive
Standard C4 format fits A4 documents folded once, ideal for invoices, letters, and statements
What Sets the ELCO Couvert Sycling C4 Apart
The self-sealing Sycling closure eliminates the need for glue or moistening, saving time during daily mailing routines. The Blue Angel certification confirms the paper meets strict environmental standards, making it a responsible choice for businesses that prioritise sustainability in their stationery.
Ideal For...
Office administrators, accounting departments, and mailrooms that regularly send invoices, statements, and correspondence in standard A4 format. The C4 size and windowless design suit organisations that require a neat, uniform appearance on outgoing mail.
Application of the ELCO Couvert Sycling C4
Place the A4 document inside the envelope
Peel off the adhesive strip and press the flap closed
ELCO is a Swiss stationery manufacturer specialising in office supplies and mailing materials. The brand focuses on functional, no-frills products for business and administrative use, with an emphasis on environmental certifications such as the Blue Angel label.
It is used for mailing standard A4 documents such as invoices, letters, and statements. The C4 size fits A4 paper folded once, and the self-sealing closure provides a secure, tamper-evident seal without glue.
No. The ELCO Couvert Sycling C4 has no window, providing a clean, uniform appearance on the front of the envelope.
The envelope is made of paper certified with the Blue Angel environmental label, confirming it meets strict sustainability and low-emission standards for paper products.
The set contains 250 pieces. The closure is a Sycling (self-sealing) adhesive strip that peels off and presses shut without the need for moistening or additional glue.
The envelope is in C4 format (229 x 324 mm) and grey in colour, a neutral tone suitable for professional business correspondence.
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