18x18 3.1 Mil Reclosable ESD Static Shielding Bags 100/Case
$143.35
/ case of 100$1.43 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
18" × 18"
Board / material
3.1 Mil
Color
Transparent
Freight class
Class 60
Specifications
| Inside dimensions | 18" × 18" (L × W) |
|---|---|
| Board / material | 3.1 Mil |
| Color | Transparent |
| Sold as | Case of 100 |
| Physical units per order increment | 100 (one case) |
| Case weight | 9.38 lb |
| Outer carton (shipping) | 26.75 × 19.5 × 2.5 in |
| LTL freight class | Class 60 |
| GTIN | 00051111778050 |
| SKU | STC370 |
About this item
SKU STC370 — 18" × 18", 3.1 Mil, Transparent. Sold as a case of 100, shipped from US warehouses.
Protect sensitive electronics with these 18x18 " reclosable static shielding bags featuring multi-layer Faraday protection and ziplock seal. 3.1 mil transparent material with ESD warning symbol printed. Sold by the case of 100 bags for cost-efficient bulk protection.
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.
Common questions
How do I know if my item fits the 18x18" size?
The listed size is 18x18". 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 Static Shielding Polymer.
Is there a drop-in substitute for STC370?
Not as an exact replacement. The closest sizes in this line are 15x18" and 18x24"; 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 STC370.
Do these bags reseal, and how do they arrive?
The closure is listed as Reclosable Zip-Top, so the bag closes without separate tape or heat. This listing is sold as one case of 100 bags — roughly $1.43 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.
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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.