9x12 3.1 Mil Reclosable ESD Static Shielding Bags 100/Case
$69.29
/ case of 100$0.69 per bag
Request bulk pricing
| Quantity (case) | Item-subtotal discount |
|---|---|
| 1–2 | Base item price |
| 3–5 | 3% off qualifying item subtotal |
| 6+ | 5% off qualifying item subtotal |
In stock · ships within 1 business day from the nearest of 5 US warehouses (IL, PA, TX, GA, CA) · 1–5 business days in transit · freight calculated at checkout · free ground shipping on orders over $99 (parcel rates up to $29.95) and over $500 (up to $120)
30-day returns on stock items · Return policy
Inside dimensions
9" × 12"
Board / material
3.1 Mil
Color
Transparent
Freight class
Class 60
Specifications
| Inside dimensions | 9" × 12" (L × W) |
|---|---|
| Board / material | 3.1 Mil |
| Color | Transparent |
| Sold as | Case of 100 |
| Physical units per order increment | 100 (one case) |
| Case weight | 3.56 lb |
| Outer carton (shipping) | 17.5 × 12.5 × 2.5 in |
| LTL freight class | Class 60 |
| GTIN | 00051111778142 |
| SKU | STC359 |
About this item
SKU STC359 — 9" × 12", 3.1 Mil, Transparent. Sold as a case of 100, shipped from US warehouses.
The 9x12" 3.1 Mil Reclosable Static Shielding Bags - ESD Protection is a reclosable poly bag for parts, samples, documents, kits, hardware, and small inventory that needs repeated access. Listed specs include size 9" x 12"; poly material; 3.1 Mil; case of 100. Use it as a packing bag, parts bag, inner poly envelope, or e-commerce bag when the item fits the listed size and thickness.
Anti-static poly bags: Good fit for electronics, circuit boards, components, parts kitting, and static-sensitive warehouse inventory. These poly bags help fulfillment, warehouse, ecommerce, and parts teams choose right-sized bags for storage, kitting, packing, and shipping workflows.
Compare nearby options
Larger, smaller and stronger options from the same family. Prices shown are current case prices; freight is calculated at checkout.
Larger size
10x14 3.1 Mil Reclosable ESD Static Shielding Bags 100/Case
$72.92
Smaller size
8x8 3.1 Mil Zip Seal Static Shielding Bags 100/Case
$44.62
Stronger option
9x12 4 Mil Reclosable Poly Bags 1000/Case PBDT3765
$305.01
Same size, different spec
9x12 2 Mil Clear Reclosable White Block Poly Bags 1000/Case
$169.52
Common questions
How do I know if my item fits the 9x12" size?
The listed size is 9x12". Plan for contents slightly smaller than the nominal size — the usable interior runs a bit under the listed measurement once the bag takes shape around what you load into it.
What does 3.1 mil film mean in practice?
A mil is one-thousandth of an inch, so 3.1 mil film is 3.1/1000" thick — 4 mil film, for example, is twice the film thickness of 2 mil. Heavier film of the same material stands up to punctures and rough handling better; lighter film costs less per bag and packs tighter. This listing's material is specified as 3.1 Mil polyethylene with static-shielding layers.
Is there a drop-in substitute for STC359?
Not as an exact replacement. The closest sizes in this line are 8x10" and 10x14"; any size change alters the usable interior. Before switching, match the listed dimensions, 3.1 mil thickness, closure type, and case count — then reorder by exact SKU STC359.
How do these bags close, and how are they shipped?
The closure is listed as Reclosable zip-top seal, so the bag closes without separate tape or heat. This listing is sold as one case of 100 bags — roughly $0.69 per bag at the current case price (confirm the live price before ordering). Orders ship from Packrift's five US warehouse regions (Central IL, NE PA, S TX, SE GA, and W CA); delivery options and timing are shown at checkout.
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.