18x20 4 Mil Reclosable FDA USDA Poly Bags 500/Case PB3830
$235.98
/ case of 500$0.47 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 500 |
| Order in multiples of | 500 |
| Case weight | 54.4 lb |
| Outer carton (shipping) | 19.5 × 14.0 × 11.75 in |
| LTL freight class | Class 60 |
| SKU | PB3830 |
About this item
SKU PB3830 — 18" × 20", 4 Mil, Clear. Sold as a case of 500, shipped from US warehouses.
18x20" clear reclosable poly bags in 4 mil polyethylene, a heavy-duty film for parts, hardware, and bulk contents. Packed 500 per case (SKU PB3830); this is a second listing of the same BOX case stock at the same price.
Open-top reclosable design: seal with twist ties, bag tape, or an impulse sealer (sold separately). Keeps parts, hardware, and products visible while protecting them from dust and moisture. Order by the case of 500.
Common questions
What actually fits inside a 18x20" bag?
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.
How does 4 mil compare with lighter or heavier film?
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 a nearby size or thickness replace PB3830?
Not as an exact replacement. The closest sizes in this line are 16x18" and 18x24" (same 4 mil film), and the same 18x20" size is also stocked in 3 and 6 mil. Before switching, match the listed dimensions, 4 mil thickness, closure type, and case count — then reorder by exact SKU PB3830.
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 Single-Track Reclosable Zipper, so the bag closes without separate tape or heat. This listing is sold as one case of 500 bags — roughly $0.47 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 "Regulatory Compliance: FDA and USDA 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.