18x16x40" 4 Mil Gusseted Poly Bags - Expandable Sides, Case of 100
$126.31
/ case of 100$1.26 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" × 16" × 40"
Board / material
4 Mil
Color
Clear
Freight class
Class 60
Specifications
| Inside dimensions | 18" × 16" × 40" (L × W × H) |
|---|---|
| Board / material | 4 Mil |
| Color | Clear |
| Sold as | Case of 100 |
| Order in multiples of | 100 |
| Case weight | 31.42 lb |
| Outer carton (shipping) | 20.0 × 14.5 × 6.75 in |
| LTL freight class | Class 60 |
| GTIN | 841436097918 |
| SKU | PB1845 |
About this item
SKU PB1845 — 18" × 16" × 40", 4 Mil, Clear. Sold as a case of 100, shipped from US warehouses.
4 mil gusseted poly bags with expandable sides designed for packing irregularly shaped items safely and efficiently. These clear polyethylene bags measure 18x16x40 " (interior dimensions) and come in a case of 100, offering reliable protection and cost-effective bulk packaging.
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
How should I judge fit for the 18x16x40" size?
The listed size is 18x16x40" — 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 40" Length x 18" Width x 16" Gusseted Sides, so that measurement is what your item has to fit within.
Is 4 mil the right thickness for my use?
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 PB1845 for the next size up or down?
Not as an exact replacement. The closest sizes in this line are 18x14x36" and 20x20x48" (same 4 mil film), and the same 18x16x40" size is also stocked in 2 mil. Before switching, match the listed dimensions, 4 mil thickness, closure type, and case count — then reorder by exact SKU PB1845.
How does the closure work, and what does a full order look like?
The closure is listed as Twist Ties, Bag Tape, or Impulse Sealers (sold separately), so the bag closes without separate tape or heat. This listing is sold as one case of 100 bags — roughly $1.26 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.