15 x 20 x 4" Expansion Poly Mailers
- Features a gusseted bottom to allow for thicker items such as binders, books and catalogs.
- Puncture, moisture, tamper and tear-resistant.
- High strength seams will keep contents intact even if over packed.
- The outer surface of the mailer is white and the inner lining is silver.
- Labels, ink and stamps adhere well.
- Self-seal closure with a double perforation tear strip for easy opening.
Stock Number | Pricing |
|---|---|
| Stock NumberEPM15204 | Pricing |

Outside W x L x D: 15 x 20 x 4"
Quantity Per Case: 100
Order in Multiples of: 1
Freight Class: 60
Weight: 6.66 EA
NMFC Code: 20475-11
Ships Parcel: Yes
These 15 x 20 x 4 inch expansion poly mailers are built from 2.5 mil polyethylene with a gusseted bottom that opens to accommodate contents up to 4 inches thick. The white exterior accepts adhesive labels, stamps, and direct-print ink cleanly, while the silver interior lining provides an added layer of protection against handling abrasion.
The gusseted design makes these mailers a practical fit for binders, folded garments, bundled documents, boxed accessories, and catalogues — applications where a flat mailer would compress or distort contents. Apparel brands, subscription box fulfillment centers, and B2B distributors shipping print materials all benefit from the added depth.
Each mailer features a self-seal adhesive strip and a double perforation tear strip for tamper-evident closure and clean recipient opening. High-strength seams hold under full load capacity. The 2.5 mil polyethylene construction is puncture, tear, and moisture resistant. Sold in cases of 100; parcel-friendly.
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