This 35-piece pack contains black HDPE bubble mailers with a 130×180 mm outer size and a 40 mm sealing flap. The outer layer is black HDPE plastic that gives the parcel a discreet, exclusive appearance and provides water-resistant protection. The inner layer is an HDPE-based bubble film that uses small air pockets to cushion impacts during transit. The pack is intended for webshop owners, craftspeople and small businesses who primarily ship smaller, flatter items.
What is included in the 35-piece pack
The pack contains 35 black HDPE bubble mailers, each in 130×180 mm outer size with a 40 mm sealing flap. The total gross weight is approximately 0.46 kg, so the pack fits compactly into a drawer or onto a shelf. The net weight per unit is around 12 g, which gives a particularly favourable postal cost for small shipments. The 35-piece quantity provides several weeks of basic cover for a mid-volume webshop or a permanent home stock for a small business.
Material and bubble lining
The outer layer of the envelope is black HDPE plastic — a robust, fundamentally water-resistant polymer that does not let through drizzle or warehouse humidity. The black colour also gives the parcel a discreet, exclusive appearance: the contents cannot be seen from outside and the mailer conveys a clean, modern message. The inside is an HDPE-based bubble film that forms a cushioning layer of small air pockets around the contents and absorbs impacts.
Size and use cases
The 130×180 mm outer size is well suited to smaller items: a handmade piece of jewellery in a box, a cosmetic sample, a smaller cream or serum, an essential oil bottle (with cotton padding), a USB stick, a smaller book or notebook, or a pack of cards and stickers. The 40 mm flap leaves room for the seal, so you do not need to fill the envelope right to the edge.
Closure and opening
The inside of the flap carries a self-adhesive strip that can be sealed in a single motion once the protective tape is removed. The envelope gets a secure, tamper-evident closure: the recipient can only access the contents by tearing the flap, so any reopening is visible. The black plastic layer also visually hides the contents — it is not translucent, so no information about the shipment can be obtained from the outside.
Storage and shelf life
Store the envelopes in a dry, cool place, away from direct sunlight. The UV resistance of HDPE plastic is good, but prolonged sun exposure is best avoided, so it is worth keeping the stock in a closed drawer or cabinet. The adhesive strip's protective tape typically retains full tack for 12 to 18 months from production — rotating your stock continuously is recommended so that you always work with fresh adhesive.