Kapak Evidence Barrier Pouch Tubing is constructed of the same combination of films which provide barrier protection for the storage of volatile evidence items. This barrier eliminates cross-contamination while protecting individuals from exposure to dangerous substances such as PCP, methamphetamine, and other chemical contamination. When properly sealed, the pouches provide a heavy-duty, airtight, and puncture resistant evidence container for collecting, transporting, and storing evidence. Pouches must be sealed with a Barrier Pouch Heat Sealer. Provided in 4.5 and 2.5 mil tubing material thickness. For use with Barrier Pouch Heat Sealers only.