18x20" 4 Mil White Block Reclosable Poly Bags - 250/Case
$138.20
/ case of 250$0.55 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
18" × 20"
Board / material
4 Mil
Color
Clear
Freight class
Class 60
Specifications
| Inside dimensions | 18" × 20" (L × W) |
|---|---|
| Board / material | 4 Mil |
| Color | Clear |
| Sold as | Case of 250 |
| Order in multiples of | 250 |
| Case weight | 27.17 lb |
| Outer carton (shipping) | 19.0 × 12.0 × 6.75 in |
| LTL freight class | Class 60 |
| GTIN | 841436096782 |
| SKU | PB4013 |
About this item
SKU PB4013 — 18" × 20", 4 Mil, Clear. Sold as a case of 250, shipped from US warehouses.
Durable 4 mil reclosable poly bags with built-in white write-on block, no labels needed. 250 bags per case for cost-effective inventory storage and shipping.
Reclosable poly bags: Good fit for parts, samples, documents, apparel accessories, small kits, and inventory that needs a resealable closure. These poly bags help fulfillment, warehouse, ecommerce, and parts teams choose right-sized bags for storage, kitting, packing, and shipping workflows.
Common questions
How much usable room does the 18x20" size really have?
The listed size is 18x20". 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 4 mil film mean in practice?
A mil is one-thousandth of an inch, so 4 mil film is 4/1000" 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 Low-Density Polyethylene (LDPE), 4 Mil thickness.
Can I swap PB4013 for the next size up or down?
Not as an exact replacement. The closest sizes in this line are 14x20" and 18x24" (same 4 mil film), and the same 18x20" size is also stocked in 2 and 6 mil. Before switching, match the listed dimensions, 4 mil thickness, closure type, and case count — then reorder by exact SKU PB4013.
How does the closure work, and what does a full order look like? And can I use them for food?
The closure is listed as Reclosable zipper with white write-on block, so the bag closes without separate tape or heat. This listing is sold as one case of 250 bags — roughly $0.55 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. On food use: the film is Low-Density Polyethylene (LDPE), 4 Mil thickness, a material commonly used in food packaging, and the manufacturer spec sheet for this item lists "Compliance: FDA and USDA food contact approved". Food-contact compliance is still certified per product lot, so check the spec sheet or contact us for lot documentation before direct food contact.
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.