9x12 Black Self-Seal Tyvek Envelopes 100/Case TYC912B
$135.53
/ case of 100$1.36 per mailer
Request bulk pricing
Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
9" × 12"
Board / material
14 lb. Olefin
Color
Black
Freight class
Class 78
Specifications
| Inside dimensions | 9" × 12" (L × W) |
|---|---|
| Board / material | 14 lb. Olefin |
| Color | Black |
| Sold as | Case of 100 |
| Order in multiples of | 1 |
| Case weight | 2.88 lb |
| Outer carton (shipping) | 13.0 × 10.25 × 4.5 in |
| LTL freight class | Class 78 |
| SKU | TYC912B |
About this item
SKU TYC912B — 9" × 12", 14 lb. Olefin, Black. Sold as a case of 100, shipped from US warehouses.
9x12" black self-seal tyvek envelopes in paper stock, packed 100 per case (SKU TYC912B); this is a second listing of the same BOX case stock at the same price.
Sized for shipping and fulfillment work; the self-seal closure needs no tape. Order by the case of 100.
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.
Order support
Questions on specs or freight?
Send the SKU, quantity, and delivery ZIP and we will confirm specs, availability, and freight before you order.