4" x 8" - 2 Mil Minigrip Reclosable Poly Bags. Minigrip s red line bags feature a single track, heavy-duty zipper that extends the width of the bag and keeps products clean and free from moisture. These premium poly bags have superior clarity. Reclosable bags can be reused. Sizes listed are the inside usable dimensions of the bag. Available in case quantities. Bags meet FDA and USDA specifications for food contact.