Envelope DL Sigel DU170 Blue 50 pcs

The Sigel DU170 envelope in DL format (110 x 220 mm) is a pack of 50 blue paper envelopes designed for sending letters and documents. Made from quality paper, these envelopes offer a consistent colour and smooth surface suitable for both personal and professional correspondence. The standard DL size fits most business letters, invoices and greeting cards while taking up minimal space in storage and mail trays.

Advantages

These envelopes combine uniform colour and reliable paper weight to produce a neat and professional appearance. The pack of 50 provides a practical quantity for office use or regular mailing. Envelopes are easy to seal and maintain their shape during handling and transport, helping to protect contained documents from bending and light dirt. The blue colour improves visibility and branding options without compromising compatibility with postal requirements.

Suitable for

• Mailing business letters, invoices and contracts
• Sending personal correspondence and greeting cards
• Office stationery supply and bulk mailing preparation
• Organising and colour-coding documents for internal distribution

Key specifications

• Format: DL (110 x 220 mm)
• Material: paper
• Colour: blue
• Pack quantity: 50 envelopes
• Closure type: standard adhesive sealing flap

How to use

Insert the folded or flat documents into the envelope, keeping the content aligned to prevent creasing at the edges. Moisten or use adhesive on the flap and press firmly to secure the seal. For bulk mailing, verify address placement and postage before sealing, and consider reinforcing heavier contents with additional inner packaging. Store unused envelopes flat in a dry environment to preserve their shape and colour.

Recommendations

Use these DL envelopes for everyday mailing tasks where a consistent, professional presentation is required. Avoid exposing paper envelopes to moisture or heavy abrasion during transit; for important or bulky items consider using additional protective packaging.