Padded Self‑Sealing Bubble Mailer Office Products HK I19 300×445mm (320×455mm) 50 pcs white

Padded Self‑Sealing Bubble Mailer Office Products HK I19 300×445mm (320×455mm) 50 pcs white are lightweight protective envelopes with an internal bubble foil lining that cushions contents during transport. The mailers are listed as 300×445 mm for the inner usable area and 320×455 mm for the outer envelope dimensions, supplied in a pack of 50 and finished in white. Each mailer uses a peel‑and‑seal adhesive strip for fast closure and is intended for shipping documents, small parcels and fragile items that require moderate shock protection and moisture resistance from everyday handling.

Advantages

The bubble mailers combine a tear‑resistant outer paper layer with a shock‑absorbing bubble foil interior to reduce impact damage. The self‑sealing peel‑and‑seal closure enables one‑step packing without additional tape, saving time in repetitive shipping tasks. Their lightweight construction helps keep postage costs lower than rigid packaging while still providing padding and basic moisture resistance. A consistent white finish supports labeling and easy application of address labels or printed stickers.

Suitable for

• Mailing printed documents, brochures and thin catalogs
• Shipping small electronic accessories, phone cases and chargers
• Protecting small fragile items such as cosmetics, jewelry boxes or souvenirs
• Sending samples, replacement parts and lightweight retail orders

Key specifications

• Inner usable size: 300 × 445 mm
• Outer envelope size: 320 × 455 mm
• Pack quantity: 50 pieces
• Color: white
• Construction: paper outer layer with internal bubble foil lining
• Closure type: peel‑and‑seal adhesive strip
• Protection: shock‑absorbing bubble padding and light moisture resistance
• Weight class: lightweight padded mailer for reduced postage costs

How to use

Insert the item to be shipped into the mailer so it lies flat and centered on the bubble lining. Remove the protective strip from the peel‑and‑seal adhesive and press the flap firmly to close, making sure the edges are aligned for a secure seal. Apply a printed address label or write directly on the outer surface. For heavier or irregularly shaped items, add internal cushioning or use secondary packaging as needed. Handle sealed mailers by supporting the contents to avoid stress on the adhesive flap during transport.

Usage recommendations

For best results, choose the mailer size that allows a small clearance around the item to maximize padding effect. Do not rely on padded mailers alone for high‑value or very fragile goods; combine with additional internal protection or a rigid outer box when necessary. Store unused mailers flat in a dry environment to preserve adhesive performance and prevent deformation of the bubble lining.