4x4" 3.1 Mil Reclosable Static Shielding Bags - ESD Protection, Case of 500
$108.42
/ case of 500$0.22 per bag
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Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
4" × 4"
Board / material
3.1 Mil
Color
Transparent
Freight class
Class 60
Specifications
| Inside dimensions | 4" × 4" (L × W) |
|---|---|
| Board / material | 3.1 Mil |
| Color | Transparent |
| Sold as | Case of 500 |
| Order in multiples of | 500 |
| Case weight | 3.7 lb |
| Outer carton (shipping) | 17.5 × 12.5 × 2.25 in |
| LTL freight class | Class 60 |
| GTIN | 51111778166 |
| SKU | STC310 |
About this item
SKU STC310 — 4" × 4", 3.1 Mil, Transparent. Sold as a case of 500, shipped from US warehouses.
The 4x4" 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 4" x 4"; poly material; 3.1 Mil; case of 500. 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.
This listing is one specification only: 4x4" 3.1 Mil Reclosable Static Shielding Bags, ESD Protection, Case of 500. Packrift publishes no color options for this product; it is one product, not a clear color range.
Common questions
How much usable room does the 4x4" size really have?
The listed size is 4x4". 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.
How does 3.1 mil compare with lighter or heavier film?
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 Multi-Layer Polyethylene with Static Shielding.
Can I swap STC310 for the next size up or down?
Not as an exact replacement. The closest sizes in this line are 3x5" and 4x6"; 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 STC310.
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 500 bags — roughly $0.22 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.