2 Mil Zip White Block Bags Clear Zip Lock Bags with White Block for writing and marking  information on the contents inside the bag. These bags are great for holding all types of  parts, supplies, and other items. .002 mil thickness.

4 Mil Zip White Block Bags White Block Clear Zip Lock Bags. Extra Heavy bags for packaging all types of products. Insert your product and write the item and number in the white block area.

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