9x12 Black Self-Seal Tyvek Envelopes 100/Case
$135.53
/ case of 100$1.36 per mailer
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Secure checkout
| Quantity (case) | Item-subtotal discount |
|---|---|
| 1–2 | Base item price |
| 3–5 | 3% off qualifying item subtotal |
| 6+ | 5% off qualifying item subtotal |
| Pallet or repeat orders | Get a delivered quote |
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Shipping & returns details
Ships from U.S. warehouses. 30-day returns on unopened stock items.
Shipping cost and timing depend on the product, quantity and destination. Parcel or freight service is used as appropriate. Shipping discounts apply only to qualifying orders and rates.
Standard delivery is to street addresses in the contiguous U.S. Eligible returns must be unused and in original packaging; return shipping may apply.
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Inside dimensions
9" × 12"
Board / material
14 lb. Olefin
Color
Black
Freight class
Class 78
From our customers
“The packaging is sturdy, well-made, and looks professional. We’re really pleased with the quality.”
“They helped us choose the right packaging for our products and made ordering easy.”
“Ordering was easy, everything arrived as described, and we’ll definitely order again.”
Questions before you order?Talk to us
Specifications
| Inside dimensions | 9" × 12" (L × W) |
|---|---|
| Board / material | 14 lb. Olefin |
| Color | Black |
| Sold as | Case of 100 |
| Physical units per order increment | 1 |
| Case weight | 2.88 lb |
| Outer carton (shipping) | 13.0 × 10.25 × 4.5 in |
| LTL freight class | Class 78 |
| GTIN | 841436064569 |
| SKU | TYC912B |
About this item
SKU TYC912B — 9" × 12", 14 lb. Olefin, Black. Sold as a case of 100, shipped from US warehouses.
The 9x12" Black Tyvek Self-Seal Mailers - Tear Resistant is a shipping mailer for documents, catalogs, apparel, small parts, photos, and lightweight e-commerce orders. Listed specs include size 9" x 12"; Tyvek material; case of 100. Use it as a mailing envelope, poly mailer, padded mailer, or flat document shipper when the item fits the listed size.
Common questions
Are Tyvek® envelopes waterproof and moisture-resistant?
Yes. Tyvek® material provides moisture resistance, protecting contents from humidity, water damage, and environmental exposure during transit and storage. This is critical for protecting documents, electronics, and moisture-sensitive products.
How do self-seal closures improve shipping efficiency?
Self-seal closures eliminate tape, staples, and manual sealing steps, reducing labor time per shipment by up to 30 seconds. This decreases fulfillment costs while ensuring consistent, professional sealing that meets carrier requirements.
Why are black envelopes better than white for B2B shipping?
Black envelopes create a premium, professional appearance that enhances brand perception with B2B recipients. They also provide better content privacy and visual appeal on delivery, differentiating your shipments from standard white mailers.
What makes Tyvek® 10 times stronger than paper envelopes?
Tyvek® is a non-woven olefin fabric engineered for tear, puncture, and burst resistance. At 14 lb., this material withstands rough handling, machinery, and debris contact that would compromise paper envelopes, reducing damage claims and replacement costs.
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Questions on specs or freight?
Send the SKU, quantity, and delivery ZIP and we will confirm specs, availability, and freight before you order.