These 5" x 7" 3 Mil co-extruded vacuum seal bags with black back are engineered for demanding food packaging and industrial applications where consistency, shelf life, and product protection are critical. Manufactured from high-barrier co-extruded film, these commercial vacuum bags provide excellent oxygen and moisture resistance to help maintain product freshness, flavor, and color. Their compact 5" x 7" size is ideal for portion control, small cuts of meat, cheese, ingredients, and sample packaging in commercial operations. Designed specifically for use with commercial chambered vacuum machines, these vacuum seal bags are not intended for at-home Foodsaver-style external suction units. The 3 Mil thickness delivers a strong, reliable seal and puncture resistance while maintaining flexibility for efficient loading, sealing, and storage.