Bubble Mailer Envelope Office Products HK K20 350x470mm/370x480mm 50 pcs white

Office Products Bubble Mailer Envelope HK K20 in white is a self-sealing padded mailing bag designed for safe shipment of small, flat or moderately bulky items. The envelope combines an outer protective layer with internal bubble-foil cushioning to reduce shock and abrasion during transport. Dimensions for the usable interior area are 350 x 470 mm, while the overall envelope size is 370 x 480 mm. The product is supplied in a pack of 50 pieces and is intended for routine postal and courier use where light impact protection and moisture resistance are required.

Advantages

The self-sealing flap simplifies packing and eliminates the need for separate tape, saving time for frequent shipments. Internal bubble cushioning provides consistent impact resistance across the entire envelope surface, while the plain white exterior offers a neat, professional appearance and is suitable for labelling. Lightweight construction reduces postage costs compared with rigid packaging, and the padded design protects thin or delicate contents from surface damage and minor drops.

Suitable for

• Shipping documents, certificates and printed materials
• Sending small electronics, accessories and components
• Mailing fragile or delicate items such as jewellery, textiles and small parts
• E-commerce order fulfilment and returns shipping

Key specifications

• Outer dimensions: 370 x 480 mm
• Usable inner dimensions: 350 x 470 mm
• Colour: white
• Packing: 50 envelopes per pack
• Closure: self-sealing adhesive flap
• Inner lining: bubble foil cushioning
• Material: lightweight padded plastic envelope

How to use

Place the item inside the bubble mailer ensuring it lies flat and centred within the cushioned area. Remove the protective strip from the adhesive flap and press the flap firmly along the length of the seal to ensure a secure closure. For added security or heavy items, reinforce the flap with packaging tape. Write or affix shipping labels on the outer surface, avoiding areas where the adhesive flap overlaps to maintain seal integrity.

Usage recommendations

For best protection, choose an envelope size that leaves at least 10–20 mm of cushioning around the item; for sharp-edged objects, wrap the item first to prevent punctures. Store unopened packs in a dry place away from direct sunlight to preserve adhesive performance and material flexibility.