The paper evidence bags are classified as “Super Heavy-Duty” by the paper industry and they will not trap moisture to cause metal evidence to rust or biological evidence to spoil and will not tear easily. They are sealed with standard evidence tape. These paper evidence bags are available in two sizes: 8 1/8” x 6” x 18” and 12” x 7” x 17”. These bags feature a pre-printed chain-of-custody and evidence markings.