18x20 4 Mil Clear Flat Poly Bags - Heavy-Duty Protection, Case of 250
$86.24
/ case of 250$0.34 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
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 | 19.3 lb |
| Outer carton (shipping) | 14.5 × 10.5 × 8.75 in |
| LTL freight class | Class 60 |
| GTIN | 841436026192 |
| SKU | PB1257 |
About this item
SKU PB1257 — 18" × 20", 4 Mil, Clear. Sold as a case of 250, shipped from US warehouses.
Protect your heaviest items with our 18x20 4 Mil clear flat poly bags, manufactured from 100% virgin polyethylene for durability and puncture resistance. Seal with twist ties, bag tape, or impulse sealers for complete shipment security.
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
Are these bags food-safe?
Yes. These 4 mil poly bags meet FDA and USDA specifications, making them suitable for food contact applications, dry goods storage, and regulated industry packaging.
What closure methods work best with these bags?
These open-top poly bags seal easily with Twist Ties, Bag Tape, or Impulse Sealers, all available separately. Choose the method that best matches your production speed and permanence requirements.
How does 4 mil thickness compare to thinner alternatives?
4 mil polyethylene provides puncture and tear resistance compared to thinner gauges, protecting fragile or heavy products while maintaining cost-efficiency. Ideal for industrial and food applications where durability matters.
Can I order multiple cases for volume savings?
Yes. Packrift offers competitive bulk pricing on cases of 250 bags. Contact our team for volume quotes on large orders to maximize your packaging ROI.
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.