BSTech Heavy-Duty Mailing Bags | 260 x 350 mm (B4) | 50 Microns | 2000 pcs

Keep your dispatch process running flawlessly with the BSTech Heavy-Duty Foil Mailing Envelopes (FB03). Built for the rigorous demands of fast-paced e-commerce businesses, mailrooms, and fulfillment networks, these B4-sized shipping bags deliver exceptional tear resistance, absolute privacy, and rapid packing speeds.

Engineered from a strong 50-micron thick co-extruded plastic film, these mailers give you the reliable puncture and stretch protection needed for local or international transit. The dual-layer material features a professional, clean white exterior for high-contrast label visibility, paired with a solid black interior for 100% opacity. This complete blackout lining ensures your customer’s contents stay totally hidden from outside view, guaranteeing security and confidentiality.

Sealing up your parcels is effortless with the ultra-strong, tamper-evident self-adhesive strip. Once pressed down, the permanent hot-melt adhesive creates an airtight lock that cannot be reopened without visibly destroying the plastic—providing a strong layer of defense against tampering.

Features & Benefits

• Complete Privacy Shield: The black inner layer stops light from passing through, keeping valuable, private, or brand-name merchandise completely hidden.

• Weatherproof Protection: The 50 µm thickness acts as a reliable barrier against rain, snow, dust, and dirt, ensuring goods arrive in perfect retail condition.

• High-Speed Packing: The straightforward peel-and-seal lip eliminates the need for scissors or tape, cutting down fulfillment time per package.

• Flawless Label Adhesion: The clean white outer surface is specially optimized for high-tack adhesion of standard thermal shipping labels, paper invoices, or permanent markers.

• Excellent Bulk Value: Supplied in a high-capacity carton of 2,000 pieces, allowing you to cut down on restocking frequencies and optimize your packaging budget.

Specifications

General Specifications

• Brand: BSTech

• Product Code: FB03

• Format Size: B4

• Pack Quantity: 2,000 pieces

• Product Colour: White (Exterior)

• Inner Colour: Black (Interior / Opaque)

• Closure Type: Self-adhesive peel-and-seal strip

Weight & Dimensions

• Width: 260 mm

• Length: 350 mm

• Maximum Pouch Thickness: 50 µm (microns)

Ideal For Shipping:

Medium apparel (shirts, jeans, dresses), tablets and electronics accessories, craft supplies, boxed goods, soft toys, and standard B4/A4 documents requiring extra room.