12 x 16 x 4" White Expandable Tyvek® Envelopes
- Constructed from 18 lb. olefin.
- Ten times stronger than paper envelopes.
- Envelopes expand to hold bulky items.
- Feature self-seal closure.
- 50 per case.
Stock Number | Pricing |
|---|---|
| Stock NumberTYE12164WS | Pricing |

Outside W x L x D: 12 x 16 x 4"
Quantity Per Case: 50
Opening: Side
Order in Multiples of: 1
Freight Class: 85
Weight: 4.46 EA
NMFC Code: 153900-8
Ships Parcel: Yes
These 12 x 16 x 4" white expandable Tyvek® envelopes are built from 18 lb. olefin, a spunbonded polyethylene material that delivers puncture, tear, and moisture resistance well beyond standard paper mailers. The 4" side gusset expands to accommodate bulky flat contents while maintaining a clean, professional exterior.
The open-side loading configuration makes these envelopes practical for catalogs, multi-document sets, soft goods, folded apparel, and packaged components that exceed the capacity of standard flat mailers. They are commonly used in corporate mailrooms, e-commerce fulfillment operations, healthcare distribution, and publishing environments.
The self-seal adhesive strip closes securely without tape or additional equipment, reducing packing time at the station. Each case contains 50 envelopes, and the product ships via parcel carrier.
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