8x4x18 4 Mil Gusseted Poly Bags - Expandable Sides, Case of 500
$113.26
/ case of 500$0.23 per bag
Request bulk pricing
Ships from the nearest of 5 US warehouses · freight calculated at checkout
30-day returns on stock items · Return policy
Inside dimensions
8" × 4" × 18"
Board / material
4 Mil
Color
Clear
Freight class
Class 60
Specifications
| Inside dimensions | 8" × 4" × 18" (L × W × H) |
|---|---|
| Board / material | 4 Mil |
| Color | Clear |
| Sold as | Case of 500 |
| Order in multiples of | 500 |
| Case weight | 29.38 lb |
| Outer carton (shipping) | 18.75 × 9.0 × 8.5 in |
| LTL freight class | Class 60 |
| GTIN | 841436098038 |
| SKU | PB1801 |
About this item
SKU PB1801 — 8" × 4" × 18", 4 Mil, Clear. Sold as a case of 500, shipped from US warehouses.
Heavy-duty 4 mil clear polyethylene gusseted bags with expandable sides and fitted bottom, ideal for packing irregularly shaped items, food products, and merchandise.
Gusseted poly bags: Good fit for bulky, irregular, or deep items that need expandable side or bottom space. These poly bags help fulfillment, warehouse, ecommerce, and parts teams choose right-sized bags for storage, kitting, packing, and shipping workflows.
Common questions
Will a boxy or bulky item fit in this 18" H x 8" W x 4" Gusseted Sides bag?
The listed size is 18" H x 8" W x 4" Gusseted Sides — the gusseted sides fold out so the bag can open to its listed depth and sit around blockier items. The catalog lists inside-usable dimensions of 18" H x 8" W x 4" Gusseted Sides, so that measurement is what your item has to fit within.
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 4 Mil LDPE (Low-Density Polyethylene).
Can I swap PB1801 for the next size up or down?
Not as an exact replacement. The closest sizes in this line are 15x9x24" and 24" Length x 12" Width x 8" Gusseted Depth; any size change alters the usable interior. Before switching, match the listed dimensions, 4 mil thickness, and case count — then reorder by exact SKU PB1801.
What do I need to seal these, and what does a full order look like?
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 $0.23 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.