15 x 20 x 4" Expansion Poly Mailers
- Dimensions: 15" x 20" x 4" exterior
- Material: 2.5 Mil Polyethylene
- Quantity: 100 mailers per case
- Weight: Approximately 6.66 lbs per case
- Shipping: Parcel eligible
Stock Number | 1 | 3 | 5 | 10+ | Add to Cart |
|---|---|---|---|---|---|
| Stock NumberEPM15204 | 1$29.24 | 3$29.24 | 5$29.24 | 10+$29.24 | Add to Cart |

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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