Introduction
This manual provides essential information for the proper use and handling of your Metronic Kraft Bubble Mailers. These mailers are designed to provide reliable protection for your items during shipping, featuring a durable kraft exterior and internal bubble cushioning.

Image: A stack of Metronic Kraft Bubble Mailers, showcasing their natural kraft brown color and flat profile.
Product Features
- Sustained Kraft Padded Bubble Mailers: Equipped with full air bubbles to protect products from external impacts. Ideal for retail or online business shipping.
- Strong Self-Sealing Adhesive: Each mailer includes a tamper-resistant self-sealing strip. The opaque kraft material ensures privacy of contents.
- Convenient and Economical: Easy to seal by peeling and folding. Lighter and smaller than boxes, reducing transportation costs. The smooth surface allows for writing, labeling, and stamping.
- Multipurpose Use: Suitable for shipping light and less fragile items such as invoices, photos, credit cards, passports, office supplies, jewelry, cosmetics, small handicrafts, fashion accessories, cards, CDs, and other small fragile items.
Setup
Metronic Kraft Bubble Mailers require minimal setup. They are ready for immediate use upon receipt.
- Unpack: Carefully remove the mailers from their packaging.
- Inspect: Before use, visually inspect each mailer for any signs of damage or defects.
- Storage: Store mailers in a cool, dry place away from direct sunlight and extreme temperatures to preserve adhesive quality and material integrity.
Operating Instructions
Follow these steps to effectively use your Metronic Kraft Bubble Mailers for shipping:
- Prepare Item: Ensure the item you intend to ship is clean and fits comfortably within the mailer's usable dimensions (approximately 6x9 inches for the 6x10 inch mailer). Do not overstuff the mailer, as this can compromise protection and sealing.
- Insert Item: Gently slide your item into the mailer. Ensure it is centered and does not press against the edges excessively.
- Seal the Mailer: Locate the self-sealing adhesive strip on the flap. Peel off the protective release liner to expose the adhesive.
- Secure Closure: Fold the flap firmly over the opening of the mailer, pressing down along the adhesive strip to create a secure, tamper-resistant seal.
- Labeling: Apply shipping labels, stamps, or write addresses directly onto the smooth kraft surface of the mailer.

Image: A diagram illustrating the usable dimensions of the mailer (6x9 inches) with a notebook placed inside, demonstrating proper item fit.

Image: A hand inserting a small photo frame into a 6x10 inch bubble mailer, demonstrating how various small items can be packaged.

Image: A close-up view showing hands peeling back the protective strip from the self-sealing adhesive, highlighting the reinforced anti-tear tape.

Image: A woman signing for a delivered package, illustrating the secure arrival of items shipped with Metronic mailers.
Maintenance
Metronic Kraft Bubble Mailers are designed for single-use and require minimal maintenance.
- Storage: Keep unused mailers in their original packaging or a clean, dry environment to protect them from dust, moisture, and potential damage to the adhesive strip.
- Avoid Extreme Conditions: Do not expose mailers to extreme heat or cold, as this can affect the integrity of the kraft paper and the adhesive.
Troubleshooting
While Metronic Kraft Bubble Mailers are straightforward to use, here are some common considerations:
| Issue | Possible Cause | Solution |
|---|---|---|
| Adhesive not sticking properly. | Dust or moisture on the adhesive strip; mailer stored in extreme temperatures; insufficient pressure applied during sealing. | Ensure surfaces are clean and dry before sealing. Store mailers in a cool, dry place. Apply firm, even pressure across the entire adhesive strip when sealing. |
| Mailer appears less protective. | Mailer is overstuffed; item is too heavy or sharp for the mailer's intended use. | Ensure items fit loosely within the mailer. For heavier or sharper items, consider using a larger mailer or additional protective packaging. |
| Contents visible through the mailer. | This product is designed to be opaque. If contents are visible, it may be due to extreme lighting conditions or damage to the mailer. | Under normal conditions, the mailer should protect privacy. If privacy is a critical concern, consider double-bagging sensitive items or using a different packaging solution. |
Specifications
| Attribute | Detail |
|---|---|
| Brand | METRONIC |
| Model Number | METRONIC |
| Item Weight | 1.48 pounds (for 50-pack) |
| Product Dimensions | 10 x 6 x 0.1 inches |
| Color | Natural Kraft Brown |
| Closure Type | Self-Seal |
| Material Type | Paper (Kraft) with Bubble Lining |
| Number of Items | 50 (per pack) |
| Sheet Size (Usable) | Approximately 6 x 9 Inches |
| Date First Available | May 7, 2020 |
Return Policy
This product is subject to a 30-day return policy for refund or replacement, as per standard retail terms. Please refer to your purchase platform's specific return guidelines for detailed instructions.
Support
For further assistance or inquiries regarding your Metronic Kraft Bubble Mailers, please contact the seller directly through the platform where the purchase was made.
You can also visit the official METRONIC store for more information and products: METRONIC Store on Amazon.




