Protective bubble mailer envelopes Office Products K20 HK 350x470mm (internal 350x470 / external 370x480) 10 pcs white

Self-adhesive bubble mailer envelopes Office Products K20 HK are padded shipping pouches designed to protect fragile items in transit and storage. The envelopes have an internal usable area of 350x470 mm and external dimensions of 370x480 mm, supplied in a pack of 10 with a white exterior. The interior features bubble-wrap padding for impact absorption and a self-seal adhesive strip for fast, tamper-evident closure. These mailers combine lightweight construction with cushioning to reduce shipping weight while protecting documents, small electronics and other delicate goods.

Advantages

Bubble padding inside each envelope provides consistent shock protection and helps prevent surface scratches and minor impacts. The self-adhesive closure enables quick sealing without additional tape, improving packing speed and offering a visible tamper-evident seal. Lightweight external material reduces postage costs compared with rigid boxes, while the padded interior maintains form and cushioning during handling. Available in a neutral white finish, the envelopes present a clean appearance suitable for professional mailings.

Suitable for

• Shipping documents and flat printed materials that require padding
• Mailing small consumer electronics such as smartphones, chargers and accessories
• Protecting fragile goods like compact optical items, small framed prints or jewelry in transit
• Packaging returns and warranty items where lightweight, protective packaging is needed

Key specifications

• Internal usable dimensions: 350 x 470 mm
• External dimensions: 370 x 480 mm
• Material: paper exterior with bubble-wrap padded interior
• Closure: self-adhesive strip (peel-and-seal)
• Color: white exterior
• Pack quantity: 10 envelopes per pack

How to use

Insert the item into the mailer so it lies flat against the padded interior, ensuring adequate cushioning around corners and edges. Remove the protective strip to expose the adhesive and press the flap firmly down along the length of the seal to close. For added security, press along the closure and corners to ensure full contact. If shipping multiple items or heavier objects, consider additional internal protection and choose appropriate courier services that match the mailer size and weight limits.

Usage recommendations

Use these bubble mailers for single flat items or small fragile objects; avoid overfilling beyond internal dimensions. For extremely delicate, heavy or high-value items, combine with additional padding or a rigid outer box. Store unopened packs in a dry environment away from direct sunlight to maintain adhesive performance and material integrity.