4 Mil White Block Reclosable Poly Bags
Heavy-duty 4 mil zip-top poly bags with a printed white write-on block for instant labeling — virgin polyethylene, FDA/USDA compliant, single track zipper.
4 Mil White Block Reclosable Poly Bags
These reclosable bags pair a strong 4 mil virgin-polyethylene wall with a built-in white block, so you can mark contents with a marker, pen or pencil and identify them at a glance — no separate label needed. The economical choice for neatly organizing, sealing and ID-ing heavier or sharper-edged products in bulk.
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What they are
- Strong 4 mil gauge, made of virgin polyethylene film
- Meets FDA and USDA requirements
- Single track zipper closure for easy opening and closing
- Printed white block for writing — mark with a marker, pen or pencil to identify contents without a label
- Keeps contents in a sealed bag and moisture free
Available sizes
In-stock sizes (inches): 3×4, 4×6, 5×8, 6×8, 6×9, 8×10, 9×12, 12×15 and 13×18. Custom sizes and custom printing are available upon request.Best for
- Neatly organizing and storing products of all sizes
- Labeling parts, hardware, samples and components without stick-on labels
- Keeping contents clean, sealed and moisture free
- Storing, displaying and shipping heavier or sharper-edged items
How to choose
- Pick 4 mil when you need extra strength and puncture resistance — roughly twice the wall of a 2 mil bag — for hardware, metal components or sharp-edged parts.
- Need a lighter-duty option? See our 2 mil white block reclosable bags.
- Don’t need a write-on block? Compare our 4 mil clear reclosable bags — same heavy-duty wall, full see-through visibility.
- Browse the full white block reclosable bags and complete reclosable bags ranges.
Why buy from Arplast
- 30-year US poly-bag manufacturer and distributor — not a reseller
- Wholesale and bulk pricing with volume discounts
- No minimum on in-stock items
- Custom sizes and custom printing available on request
Frequently asked questions
What does the white block on a 4 mil reclosable bag do?
The white block is a printed write-on panel on the bag. Use a marker, pen, or pencil to mark it so you can identify the contents of the bag at a glance without using a separate stick-on label.
What are the bags made of, and do they meet FDA and USDA requirements?
They are made of strong 4 mil virgin polyethylene film that meets FDA and USDA requirements, making them suitable for food and pharmaceutical applications as well as general storage and shipping.
Why choose 4 mil instead of 2 mil white block bags?
At 4 mil the polyethylene wall is roughly twice as thick as a 2 mil bag, giving better puncture and tear resistance. Choose 4 mil for hardware, metal components, sharp-edged parts, and items that get opened and resealed often; choose 2 mil for lighter retail or craft items.
What type of closure do these bags have?
Each bag features a single track zipper closure that opens and closes easily, seals securely, and keeps contents clean and free from moisture.
What sizes of 4 mil white block reclosable poly bags do you stock?
Arplast stocks sizes including 3×4, 4×6, 5×8, 6×8, 6×9, 8×10, 9×12, 12×15, and 13×18. If you need a size that is not on the shelf, we also produce custom sizes to your specification.
Is there a minimum order, and can I get custom sizes or printing?
There is no minimum order on in-stock sizes, and wholesale volume pricing lowers your per-bag cost as quantities increase. Custom sizes and custom printing are available upon request.
Same-Day Shipping
on 99% of in-stock orders
Direct Import Pricing
wholesale by the case
No Minimum Order
on in-stock items
30+ Years in Business
packaging expertise