7x7 Heavy Duty Flat Poly Bags - 4 Mil Thickness
These 7x7 flat poly bags deliver serious protection in a versatile square size. At 4 mil thickness, they're our heavy-duty option — built for hardware, parts, craft supplies, and anything that needs puncture-resistant, moisture-proof storage. Crystal-clear LDPE lets you see contents at a glance while keeping everything clean and organized.
Specs: 7 x 7" | 4 mil | Virgin LDPE | 1000/case | FDA food-contact compliant
Key Features
- Heavy-Duty 4 Mil Thickness: Twice as thick as standard bags — resists punctures from sharp parts, screws, or jewelry findings
- Crystal-Clear Clarity: 100% virgin LDPE provides excellent transparency for quick identification without opening
- Moisture & Dust Protection: Keeps hardware rust-free and craft supplies pristine during storage
- Versatile Square Size: 7x7 is perfect for small parts kits, craft supply bundles, or square items like coasters
- Heat Sealable: Create a permanent tamper-evident seal with any impulse sealer
Applications
- Hardware & Parts: Organize screws, nuts, bolts, and small components — 4 mil resists punctures from sharp edges
- Craft Supplies: Package beads, buttons, sequins, or findings for your Etsy shop or craft fair booth
- Jewelry Making: Store and sell earring sets, bracelet components, or charm collections
- Food Packaging: FDA-compliant for cookies, candy, or small baked goods at farmers markets
- Samples & Kits: Assemble product samples, promotional kits, or multi-piece sets
Common Questions
Q: How thick is 4 mil compared to standard poly bags?
A: 4 mil is considered heavy-duty — about twice as thick as a standard 2 mil bag. It's ideal for sharp items like hardware, jewelry findings, or anything that might puncture thinner bags.
Q: Can I use these bags for selling food at farmers markets?
A: Yes! These bags are made from 100% virgin LDPE resin that meets FDA/USDA food-contact specifications. They're safe for cookies, candy, and baked goods.
Q: How do I seal these bags?
A: You can fold over and tape, use a twist tie, or heat seal with an impulse sealer for a professional, tamper-evident closure.
Why Choose Cellobags.com
For over 40 years, we've helped small businesses, Etsy sellers, and craft fair vendors find the perfect packaging. Our heavy-duty 7x7 poly bags ship fast from stock — most orders go out within 24 hours so you never miss a market day. Questions? Our packaging experts are here to help you succeed.