16 x 18 4 Mil 500/CTN Flat Poly Bag

Heavy-duty flat poly bags built for large-format packaging needs. These 16 x 18 inch, 4 mil flat poly bags from Prism Pak deliver exceptional strength and clarity for packing, storing, and shipping oversized items. Made from 100% virgin Low-Density Polyethylene (LDPE) resin right here in the USA, they are engineered to outperform standard poly bags — keeping your products protected from moisture, dust, and physical damage at every stage of handling and transit.

Size: 16" x 18" | Thickness: 4 mil | Material: 100% virgin LDPE | Quantity: 500 bags per carton | Compliance: FDA food-contact compliant

• Extra-heavy 4 mil construction delivers over three times the impact resistance and twice the tensile strength of standard LDPE bags, protecting bulky and heavy items throughout transit and storage.
• Generously sized 16 x 18 format accommodates oversized products, multi-piece kits, folded goods, and bulk items that simply will not fit in smaller poly bags.
• FDA food-contact compliant virgin LDPE resin makes these bags safe for direct contact with food — ideal for bakery items, produce, dry goods, and prepared foods.
• Crystal-clear visibility maintains full product inspection, label scanning, barcoding, and retail presentation without ever needing to open the bag.
• Heat-sealable construction allows you to create a tamper-resistant, airtight closure that locks in freshness and secures contents during distribution and storage.
• Made in the USA from 100% virgin resin — no recycled materials means consistent quality, thickness, and purity across every single bag in the carton.
• In stock, ships within 24 hours — ready to support your production schedule without long lead times or backorder delays.

Where it works best:

• Food packaging: bakery loaves, tortillas, large produce portions, bulk dry goods, deli items, cheese blocks, and frozen food packs.
• Retail & e-commerce: clothing, apparel, folded textiles, large garments, blankets, and bundled multi-item product kits.
• Industrial & manufacturing: sheet metal parts, foam inserts, oversized hardware kits, machine components, and bulk fastener sets.
• Medical & lab supplies: sterile equipment accessories, disposable protective gear, lab specimen packaging, and supply kits.
• Agriculture & floral: flower bunches, garden product packaging, seed bags, and landscape material bundling.
• Moving & document protection: framed prints, large documents, flat paper goods, books, and moisture-sensitive items requiring a reliable barrier.

Solves key pain points: Undersized or thin bags cause real problems — split seams, torn corners, moisture infiltration, and damaged goods that generate returns and complaints. These 4 mil flat poly bags hold up under actual working conditions: heavy loads, abrasive surfaces, and stacking pressure in warehouse environments. The 16 x 18 inch dimensions solve the constant struggle of forcing large items into bags that never quite fit. And because they are manufactured from 100% virgin LDPE, you get consistent seal strength and crystal-clear clarity from the first bag to the last — no batch-to-batch surprises in your production line.

Order the flat poly bag that is ready for your biggest packaging challenges. Prism Pak's 16 x 18 4 mil bags are in stock, priced competitively for carton-quantity buyers, and ship within 24 hours. Reliable performance, food-safe materials, and American manufacturing — all in one durable, versatile bag. Stock up today and keep your line moving.