Direct answer: For reclosable poly bags, match width, length, mil thickness, closure style, white-block marking area, and case quantity.
Poly bags are simple until the wrong size or thickness slows a packing line. The right exact-spec match depends on the part size, bag opening, writing area, and whether the contents need puncture resistance.
Poly bag exact-spec fields
| Primary spec | Width x length |
|---|---|
| Thickness | Mil rating |
| Closure | Reclosable zipper, open-end, or sealable bag |
| Marking area | Plain clear or white-block bag |
| Example SKU | PB3950 - 4 x 6 in 2 mil white-block reclosable poly bags, 1000/case |
Use Cases
- Small parts and hardware kitting
- Inventory labeling with a write-on white block
- Repair-shop parts storage
- Warehouse pick bins and replenishment workflows
Exact-Spec Checks Before You Buy
- Confirm whether the listed size is width x length.
- Choose thicker bags for heavier or sharper parts.
- Use white-block bags when packers need to write SKU, lot, or count.
- Confirm case quantity before comparing unit cost.
Packrift Products and Resources
- PB3950 - 4 x 6 in 2 mil white-block reclosable poly bags
- Poly bag sizes by mil and dimension
- Labels for inventory workflows
Related Buying Guides
FAQ
What does mil mean for poly bags?
Mil is a thickness measurement. Higher mil bags are thicker and usually more resistant to punctures and handling damage.
When should I use a white-block poly bag?
Use a white-block bag when workers need a readable write-on area for SKU, lot number, bin location, or quantity.
Should I size the bag to the part or the carton?
Size the bag to the part or kit contents first, then confirm the bagged item still fits the carton or mailer.