Mylar zip lock bags are great for storing seeds to keep out light, moisture and static electricity. They are ideal for long term storage for these reasons. We use these to keep our seeds in the best condition and to extend the life of the seeds.FDA approved for food storage. Thickness is 2.5 mil. YOU CAN USE A REGULAR HOUSEHOLD IRON TO HEAT SEAL THESE BAGS 20 BAGS INCLUDED with this item
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