BSTech Heavy-Duty Mailing Bags | 260 x 350 mm (B4) | 50 Microns | 100 pcs

Efficiently package your mid-sized orders with the BSTech Heavy-Duty Foil Mailing Envelopes (FB03). Tailored for professional e-commerce merchants, busy mailrooms, and fulfillment networks, these versatile B4 shipping bags provide the ideal balance of rugged protection, absolute confidentiality, and fast processing speeds for everyday parcel volumes.

Manufactured from a high-performance, co-extruded 50-micron thick plastic film, these mailers deliver robust tear and puncture resistance, ensuring that clothing items or rigid product corners do not pierce the plastic during transit. The advanced dual-layer material features a clean white exterior that gives your deliveries a premium retail look and ensures clear label visibility, backed by a solid black interior for 100% opacity. This complete blackout design keeps your customer’s contents entirely hidden from outside view, guaranteeing security and privacy.

The integrated, tamper-evident self-adhesive strip makes sealing items quick and effortless. Once pressed down, the permanent bond cannot be reopened without visibly tearing the bag, providing a reliable layer of defense against tampering and theft.

Features & Benefits

• Versatile B4 Capacity: Perfectly sized for standard documentation folders, catalogs, textbooks, and compact retail products.

• 100% Opaque Privacy Shield: The deep black internal lining blocks out all light, keeping valuable or private items completely confidential.

• Weatherproof Protection: At 50 µm thick, these bags act as a durable barrier against rain, snow, dirt, and rough handling through global postal systems.

• High-Speed Sealing: The simple peel-and-seal lip eliminates the need for tape or scissors, drastically reducing fulfillment times on your packing line.

• Convenient Pack Size: Supplied in an inner carton of 100 pieces, allowing you to keep large mailers readily available at your packing stations without taking up excessive warehouse space.

Specifications

General Specifications

• Brand: BSTech

• Product Code: FB03

• Format Size: B4

• Pack Quantity: 100 pieces (Inner carton)

• 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:

T-shirts, thin sweaters, cosmetics, books, document sets, jewelry boxes, tablets, and smaller e-commerce goods requiring dependable, lightweight protection.