Envelope with stripe Nenurodyta B4 250×353×40 mm 130 g — gusseted mailing envelope

Envelope with stripe Nenurodyta B4 250×353×40 mm 130 g is a gusseted mailing envelope designed to carry thicker contents while maintaining a compact external size. The envelope is made from 130 g paper and includes a reinforcement stripe that enhances seal reliability during handling and transit. A 40 mm gusset allows the envelope to expand to accommodate multiple documents, brochures or small publications without excessive folding.

Advantages

The combination of 130 g paper and a reinforcement stripe provides a balance of rigidity and flexibility, reducing the risk of tearing at the seal. The 40 mm gusset increases internal capacity compared with standard flat envelopes, permitting neat packing of booklets, contract packs or promotional materials. The simple design supports efficient stuffing and sealing workflows in office and mailing environments.

Suitable for

• Mailing brochures, booklets and magazines
• Sending contract packs, invoices and multiple documents
• Office storage and internal document transport
• Postal shipments where a reinforced seal is preferable

Key specifications

• Format: B4, external dimensions 250 × 353 × 40 mm
• Paper weight: 130 g/m²
• Gusset width: 40 mm to increase internal capacity
• Reinforcement: adhesive stripe for improved seal strength
• Construction: gusseted side panels for expansion

How to use

Insert documents, brochures or booklets into the envelope through the top opening and push contents gently toward the bottom to make full use of the gusset. Align the flap and press the reinforcement stripe firmly to seal; allow any adhesive time to bond as specified by the manufacturer. For heavier or bulkier contents distribute material evenly to avoid over-stressing the seal and to keep the envelope shape consistent for postal handling.

Usage recommendations

For mailing, verify that contents comply with postal size and weight limits. If sending fragile or high-value items, use additional internal padding or a secondary protective sleeve. Store envelopes flat in a dry environment to prevent moisture-induced deformation and ensure optimal sealing performance.