8x18" 4 Mil Clear Flat Poly Bags - Heavy-Duty Protection, Case of 500
$93.52
/ case of 500$0.19 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
8" × 18"
Board / material
4 Mil
Color
Clear
Freight class
Class 60
Specifications
| Inside dimensions | 8" × 18" (L × W) |
|---|---|
| Board / material | 4 Mil |
| Color | Clear |
| Sold as | Case of 500 |
| Order in multiples of | 500 |
| Case weight | 19.6 lb |
| Outer carton (shipping) | 10.25 × 8.5 × 8.5 in |
| LTL freight class | Class 60 |
| GTIN | 841436025492 |
| SKU | PB1136 |
About this item
SKU PB1136 — 8" × 18", 4 Mil, Clear. Sold as a case of 500, shipped from US warehouses.
4 mil flat poly bags sized 8 " x 18 " for secure product protection during storage and shipping. Sold by the case, 500 bags per box for maximum cost efficiency.
Flat poly bags: Good fit for bulk storage, product protection, clear inventory handling, fulfillment packing, and 4 mil packaging workflows. These poly bags help fulfillment, warehouse, ecommerce, and parts teams choose right-sized bags for storage, kitting, packing, and shipping workflows.
Common questions
How do I know if my item fits the 8x18" size?
The listed size is 8x18". 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.
Can I swap PB1136 for the next size up or down?
Not as an exact replacement. The closest sizes in this line are 7x18" and 8x20" (same 4 mil film), and the same 8x18" size is also stocked in 1 and 1.5 mil. Before switching, match the listed dimensions, 4 mil thickness, and case count — then reorder by exact SKU PB1136.
How do I close these bags, and how do they ship?
These are open-top bags — close them with a heat sealer, bag tape, twist ties, or staples, whichever fits your workflow. This listing is sold as one case of 500 bags — roughly $0.19 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.